The Gambia's long-term leader Yahya Jammeh says he will step down, after refusing to accept defeat in elections.
In an announcement on state TV, he said it was "not necessary that a single drop of blood be shed".
The statement followed hours of talks between Mr Jammeh and West African mediators. He gave no details of what deal might have been struck.
Mr Jammeh has led the country for 22 years but was defeated in December's election by Adama Barrow.
Adama Barrow: From estate agent to Gambian president
Jammeh: The man in charge for 22 years
Why is it The Gambia, not Gambia?
Mr Barrow has been in neighbouring Senegal for days and was inaugurated as president in the Gambian embassy there on Thursday.
Troops from several West African nations, including Senegal, have been deployed in The Gambia, threatening to drive Mr Jammeh out of office if he did not agree to go.
Mr Jammeh's decision to quit came after talks with the presidents of Guinea and Mauritania.
"I have decided today in good conscience to relinquish the mantle of leadership of this great nation with infinite gratitude to all Gambians," he said.
"I promise before Allah and the entire nation that all the issues we currently face will be resolved peacefully."
Shortly before the TV address, Mauritanian President Mohamed Ould Abdel Aziz said that a deal had been struck and that Mr Jammeh would leave the country. He gave no further details.
Mr Jammeh was given an ultimatum to leave office or be forced out by UN-backed troops, which expired at 16:00 GMT on Friday.
The deadline was set by the Economic Community of West African States (Ecowas), a regional grouping backed by the United Nations.
The first signs of a breakthrough came on Friday when a senior aide to the new president told the BBC's Umaru Fofana that Mr Jammeh had agreed to step down.
Mr Jammeh had at first accepted defeat in the election but then reversed his position and said he would not step down.
He declared a 90-day state of emergency, blaming irregularities in the electoral process.
The electoral commission accepted that some of its early results had contained errors but said they would not have affected Mr Barrow's win.
Mr Jammeh had vowed to stay in office until new elections were held.
Friday, January 20, 2017
America's newest First Family: The Trumps in profile
Donald Trump shocked the world with his victory over Hillary Clinton to win the race for the White House, despite previously never holding political office in the US.
The billionaire businessman - listed by Forbes as the 324th wealthiest person in the world - has built an empire of apartment buildings, hotels, casinos and golf courses across the world.
But he must now build an entirely different legacy as he hands over control of his company to his children and begins his first role in politics as the most powerful man on Earth.
The Donald
Born on 14 June, 1946, in Queens, New York, Donald Trump was raised in the city and brought up to take over his father's real estate and construction firm.
He is the second youngest of five children to Mary and Fred Trump.
Three of his siblings - Maryanne, Elizabeth and Robert - are still alive, but his older brother Fred Jr died in 1981 from alcoholism.
Elizabeth Trump is a former Chase banker; Maryanne is a retired judge on the US Court of Appeals for the Third Circuit and Robert served as a top executive in the family business.
Fred Trump was born in New York and became one of the biggest real estate developers in the city. His mother Mary was born in Scotland.
They met in New York and married in 1936.
Donald Trump left school at the age of 13 and enrolled in the New York Military Academy.
He was not drafted during the Vietnam War, obtaining four student deferments while in college from 1964 to 1968 and being granted a 1-Y medical deferment in 1968 apparently due to heel spurs.
He received a BA in economics from the Wharton School at the University of Pennsylvania in 1968 and took over control of his father's company three years later, renaming it The Trump Organization.
Once in charge of the family company, he moved it to Manhattan and has built a number of properties including the 58-storey Trump Tower.
His business dealings have seen him acquire hotels around the world, including the Mar-a-Lago estate in Palm Beach, Florida, where he held many of his rallies during the presidential election campaign.
After his father died in 1999, he and his siblings received an equal portion of his estate, worth around $250m to $300m.
As of 2016, Forbes has estimated his net worth to be around $3.7bn.
Mr Trump owns a number of entertainment properties - including Miss Universe, Miss USA and the Miss Teen USA beauty pageants up until 2015 - and was the host on the popular reality TV show The Apprentice in the US between 2004 and 2015.
He also set up the now defunct Trump University, which aimed to give training in real estate, property management and wealth acquisition.
Among The Trump Organization estate is the Turnberry golf course in Ayrshire, Scotland, and several building complexes in Manhattan.
He ran his campaign as the "outside" candidate in 2016 - a tactic which he combined with his plea to "drain the swamp" of Washington to generate support for his "anti-establishment" message.
But he had raised the idea of running for president before - in 2004 and 2012 - and also considered running for New York Governor in 2006 and 2014.
He also attempted to campaign for the Reform Party presidential nomination in 2000, but dropped out before the primaries began.
His organisation is very much a family-run affair, with nearly all of his five children working in various roles.
Mr Trump has been married three times.
His first wife, model Ivana Zelnickova, was the first to call him "The Donald".
They married in 1977 in Manhattan and had three children - Donald Jr, Ivanka and Eric. The couple divorced in 1990.
He married his second wife, actress Marla Marples, in 1993 and the couple had one daughter, Tiffany. They were divorced in 1999.
Mr Trump began a relationship with Slovenian model Melania Knauss in 1998. They married in 2005 and have one son, Barron, who was born in March 2006.
Melania
The former model was born in communist Yugoslovia in 1970 and becomes the first presidential spouse born outside the US since Louisa Adams in 1825.
The 46-year-old daughter of a children's clothing patternmaker and a car dealer grew up in Sevnica and began her modelling career at the age of 16.
She has her own jewellery and skin care line and speaks five languages - Slovenian, Serbian, English, French and German.
The couple met at a Fashion Week party in New York in September 1998, and were engaged in 2004 before getting married in a church ceremony in Florida the following year.
Mrs Trump has insisted she is not shy about giving her husband political advice, but will not be able to avoid the limelight - as she did for much of his campaign - when they enter the White House.
Asked by The New York Times in 1999 what her role would be if her husband became President, she said she would be "very traditional, like Betty Ford or Jackie Kennedy".
But she has said she will remain in New York with their son Barron, rather than living in the White House in Washington DC.
Donald Trump Jr
A father-of-five, the 38-year-old followed in his father's footsteps at the University of Pennsylvania, where he earned his degree in finance and real estate.
Donald Jr went to work for his father in 2001 and is an executive vice president of the Trump Organization.
Ivanka
A former fashion model, Ivanka is executive vice president of acquisitions and development for the Trump Organization.
The 35-year-old launched her own jewellery brand - Ivanka Trump Fine Jewelry - before joining the family business. She also has her own fashion line.
She is married to publishing scion Jared Kushner, and they have two children. Ivanka converted to Orthodox Judaism before marrying Jared in 2009.
Eric
Eric Trump went straight to work for his father after graduating from Georgetown University.
He is also an executive vice president of the Trump Organization, owns and operates the Trump Winery and oversees his father's 18 golf clubs.
Eric is married to Lara Yunaska, TV producer.
Tiffany
Tiffany is Donald Trump's only child with Marla Marples and was raised by the actress in Los Angeles.
She is currently studying at the University of Pennsylvania.
Barron
Barron is the youngest of Donald Trump's children, and lives on his own floor of Trump Tower in Manhattan, with the tycoon and his third wife Melania. He is 10.
The billionaire businessman - listed by Forbes as the 324th wealthiest person in the world - has built an empire of apartment buildings, hotels, casinos and golf courses across the world.
But he must now build an entirely different legacy as he hands over control of his company to his children and begins his first role in politics as the most powerful man on Earth.
The Donald
Born on 14 June, 1946, in Queens, New York, Donald Trump was raised in the city and brought up to take over his father's real estate and construction firm.
He is the second youngest of five children to Mary and Fred Trump.
Three of his siblings - Maryanne, Elizabeth and Robert - are still alive, but his older brother Fred Jr died in 1981 from alcoholism.
Elizabeth Trump is a former Chase banker; Maryanne is a retired judge on the US Court of Appeals for the Third Circuit and Robert served as a top executive in the family business.
Fred Trump was born in New York and became one of the biggest real estate developers in the city. His mother Mary was born in Scotland.
They met in New York and married in 1936.
Donald Trump left school at the age of 13 and enrolled in the New York Military Academy.
He was not drafted during the Vietnam War, obtaining four student deferments while in college from 1964 to 1968 and being granted a 1-Y medical deferment in 1968 apparently due to heel spurs.
He received a BA in economics from the Wharton School at the University of Pennsylvania in 1968 and took over control of his father's company three years later, renaming it The Trump Organization.
Once in charge of the family company, he moved it to Manhattan and has built a number of properties including the 58-storey Trump Tower.
His business dealings have seen him acquire hotels around the world, including the Mar-a-Lago estate in Palm Beach, Florida, where he held many of his rallies during the presidential election campaign.
After his father died in 1999, he and his siblings received an equal portion of his estate, worth around $250m to $300m.
As of 2016, Forbes has estimated his net worth to be around $3.7bn.
Mr Trump owns a number of entertainment properties - including Miss Universe, Miss USA and the Miss Teen USA beauty pageants up until 2015 - and was the host on the popular reality TV show The Apprentice in the US between 2004 and 2015.
He also set up the now defunct Trump University, which aimed to give training in real estate, property management and wealth acquisition.
Among The Trump Organization estate is the Turnberry golf course in Ayrshire, Scotland, and several building complexes in Manhattan.
He ran his campaign as the "outside" candidate in 2016 - a tactic which he combined with his plea to "drain the swamp" of Washington to generate support for his "anti-establishment" message.
But he had raised the idea of running for president before - in 2004 and 2012 - and also considered running for New York Governor in 2006 and 2014.
He also attempted to campaign for the Reform Party presidential nomination in 2000, but dropped out before the primaries began.
His organisation is very much a family-run affair, with nearly all of his five children working in various roles.
Mr Trump has been married three times.
His first wife, model Ivana Zelnickova, was the first to call him "The Donald".
They married in 1977 in Manhattan and had three children - Donald Jr, Ivanka and Eric. The couple divorced in 1990.
He married his second wife, actress Marla Marples, in 1993 and the couple had one daughter, Tiffany. They were divorced in 1999.
Mr Trump began a relationship with Slovenian model Melania Knauss in 1998. They married in 2005 and have one son, Barron, who was born in March 2006.
Melania
The former model was born in communist Yugoslovia in 1970 and becomes the first presidential spouse born outside the US since Louisa Adams in 1825.
The 46-year-old daughter of a children's clothing patternmaker and a car dealer grew up in Sevnica and began her modelling career at the age of 16.
She has her own jewellery and skin care line and speaks five languages - Slovenian, Serbian, English, French and German.
The couple met at a Fashion Week party in New York in September 1998, and were engaged in 2004 before getting married in a church ceremony in Florida the following year.
Mrs Trump has insisted she is not shy about giving her husband political advice, but will not be able to avoid the limelight - as she did for much of his campaign - when they enter the White House.
Asked by The New York Times in 1999 what her role would be if her husband became President, she said she would be "very traditional, like Betty Ford or Jackie Kennedy".
But she has said she will remain in New York with their son Barron, rather than living in the White House in Washington DC.
Donald Trump Jr
A father-of-five, the 38-year-old followed in his father's footsteps at the University of Pennsylvania, where he earned his degree in finance and real estate.
Donald Jr went to work for his father in 2001 and is an executive vice president of the Trump Organization.
Ivanka
A former fashion model, Ivanka is executive vice president of acquisitions and development for the Trump Organization.
The 35-year-old launched her own jewellery brand - Ivanka Trump Fine Jewelry - before joining the family business. She also has her own fashion line.
She is married to publishing scion Jared Kushner, and they have two children. Ivanka converted to Orthodox Judaism before marrying Jared in 2009.
Eric
Eric Trump went straight to work for his father after graduating from Georgetown University.
He is also an executive vice president of the Trump Organization, owns and operates the Trump Winery and oversees his father's 18 golf clubs.
Eric is married to Lara Yunaska, TV producer.
Tiffany
Tiffany is Donald Trump's only child with Marla Marples and was raised by the actress in Los Angeles.
She is currently studying at the University of Pennsylvania.
Barron
Barron is the youngest of Donald Trump's children, and lives on his own floor of Trump Tower in Manhattan, with the tycoon and his third wife Melania. He is 10.
Trump hours away from world's most powerful job
Donald John Trump, a billionaire with no experience of government or the military, will be sworn in as America's 45th President and commander-in-chief later today.
The businessman, who became well known to millions of Americans as the star of his reality TV series The Apprentice, steps up to his new job at the age of 70 - breaking Ronald Reagan's record as the oldest man to assume the Presidency.
On Thursday, the trappings of high office were already evident.
He dispensed with his familiar personal jet and its Trump branding, and he arrived in Washington DC aboard a US military plane.
Mr Trump and Vice President-elect Mike Pence later laid a wreath at Arlington Cemetery, accompanied by members of his family including the soon-to-be First Lady Melania Trump.
The businessman, who became well known to millions of Americans as the star of his reality TV series The Apprentice, steps up to his new job at the age of 70 - breaking Ronald Reagan's record as the oldest man to assume the Presidency.
On Thursday, the trappings of high office were already evident.
He dispensed with his familiar personal jet and its Trump branding, and he arrived in Washington DC aboard a US military plane.
Mr Trump and Vice President-elect Mike Pence later laid a wreath at Arlington Cemetery, accompanied by members of his family including the soon-to-be First Lady Melania Trump.
Thursday, January 19, 2017
Three dead after car hits people in Australian city of Melbourne
Three people are dead and at least 20 people have been injured after a car hit pedestrians in Australia's second-largest city of Melbourne.
Police said the car was deliberately driven into city centre crowds just before 2pm on Friday, local time.
Video footage from a witness showed a maroon car driving in circles in an intersection outside Flinders Street railway station with the driver hanging his arm out the window.
The man then drove up the pedestrian section of Bourke Street mall, deliberately hitting people, police said.
One of those killed was a young child.
Ambulance Victoria said that several of those being treated had serious injuries and Royal Children's Hospital said in a statement that they were treating four children from the scene.
Acting Commander Stuart Bateson said the situation was now "contained" and a man has been arrested.
Police confirmed in a statement that they had shot the man before he was taken into custody.
He is being treated for non-life threatening injuries.
Mr Bateson said that the incident is not believed to have been terror-related.
Police said in a statement: "It is believed police were in pursuit of a vehicle" when it "deliberately struck a number of pedestrians".
They added: "Police understand the incident is linked to a stabbing that took place in Windsor early this morning involving parties known to one another.
"Following this incident, it is alleged the same man took a woman, who is known to him, hostage in his car. She managed to escape from the car on the Bolte Bridge earlier today."
Mr Bateson added: "There is no further threat to the public at this stage."
Police said the car was deliberately driven into city centre crowds just before 2pm on Friday, local time.
Video footage from a witness showed a maroon car driving in circles in an intersection outside Flinders Street railway station with the driver hanging his arm out the window.
The man then drove up the pedestrian section of Bourke Street mall, deliberately hitting people, police said.
One of those killed was a young child.
Ambulance Victoria said that several of those being treated had serious injuries and Royal Children's Hospital said in a statement that they were treating four children from the scene.
Acting Commander Stuart Bateson said the situation was now "contained" and a man has been arrested.
Police confirmed in a statement that they had shot the man before he was taken into custody.
He is being treated for non-life threatening injuries.
Mr Bateson said that the incident is not believed to have been terror-related.
Police said in a statement: "It is believed police were in pursuit of a vehicle" when it "deliberately struck a number of pedestrians".
They added: "Police understand the incident is linked to a stabbing that took place in Windsor early this morning involving parties known to one another.
"Following this incident, it is alleged the same man took a woman, who is known to him, hostage in his car. She managed to escape from the car on the Bolte Bridge earlier today."
Mr Bateson added: "There is no further threat to the public at this stage."
The seven biggest threats to Donald Trump's presidency
New York, United States - US President Barack Obama's inauguration shows featured the likes of Beyonce and Bruce Springsteen. Country singer Toby Keith, who is perhaps the top name at Donald Trump's welcome bash, does not come with quite the same stardust.
But, sadly for Trump, his kudos among pop stars is not his biggest problem. The president-elect will take the oath of office on January 20 amid widespread scepticism from the public and with ready-made enemies in US spy agencies, the business community and even his own Republican Party.
INTERACTIVE: Donald Trump's cabinet picks - Who's who?
On the surface, Trump's feisty use of Twitter and his bullish handling of reporters at a recent press conference make him look the alpha male. But his bravado masks vulnerabilities seldom seen by those about to enter the Oval Office.
Before the billionaire property magnate is sworn in on the steps of the US Capitol on Friday, Al Jazeera spoke to Washington insiders about the headaches Trump is likely to suffer during his first 100 days of rolling out plans to make America great again.
1. Public opinion
Trump lost the popular vote on November 8 by 2.9 million votes, only winning the election via a superior tally in the Electoral College. The latest CBS News poll showed only 32 percent of respondents had a favourable view of him, lower than George W Bush (44 percent) and Obama (60 percent) when they were first sworn in.
According to Pew Research Center, most Americans want Trump to publish his tax returns, worry about him using the Oval Office to line his pockets and think he has explained his policy goals poorly. Others fret about his impulsive behaviour, which was on show again with recent Twitter tirades against the actress Meryl Streep, and John Lewis, a civil rights icon.
Trump's efforts to reopen factories on US soil are popular in mostly white rust-belt zones, but his appeal in these areas may ebb as he cuts healthcare plans for the poor. "Those who voted for him will soon see that his policies will impact them negatively as well," Susan Smith, from the Muslim Peace Fellowship, a think-tank, told Al Jazeera.
2. Protesters
Not everyone heading to Washington on Friday will cheer the 45th president's oath-taking. Officials have struggled to find enough space for protesters to stage some 25 rallies over the weekend. The biggest is the Women's March on Washington, which will draw some 200,000 people decrying threats to abortion laws, affordable healthcare and equal pay.
OPINION: The prospect of the US as a 'banana republic'
Other groups will spotlight everything from ending war to legalising marijuana. Environmentalists are irked by Trump's claim that climate change is a Chinese hoax. Big rallies will also take place in Los Angeles, Chicago and other major cities in the US and globally.
Veteran protester Paul Kawika Martin, from the anti-war group Peace Action, was sceptical about the impact of rallies, which are not likely to match the scale of those against the Iraq War of 2003. "Big street protests are slowly going the way of dinosaurs," Martin told Al Jazeera.
Others activists, such as Khury Petersen-Smith, praise recent gains made by the Black Lives Matter race justice movement and the Standing Rock oil pipeline protests.
"We cannot only put our faith in elected officials," Petersen-Smith told Al Jazeera. "We need to harness grassroots power, keep immigration police out, turn college campuses into sanctuaries and work locally to create pockets of resistance."
Of course, hundreds of thousands of others will head to the capital to root for the next commander-in-chief, including the motorcycle cavalcade Bikers for Trump and the attendees of the
3. Republicans
Trump's fans were always the grassroots folk who turned out in droves to his campaign rallies, not well-heeled apparatchiks in Washington. The latter would have preferred Jeb Bush, Marco Rubio or another established Republican candidate to lead the party.
US: Political art artists making noise against Trump [2:09]
That said, members are broadly falling into line behind Trump in pursuit of nixing Obamacare and other bullet points on the right's agenda. But troubles persist. Rubio and John McCain, an Arizona senator, kicked up a fussduring hearings for Trump's appointees.
They worry about Kremlin-backed hackers swinging the election and Trump's admiration of Russian President Vladimir Putin. Others fear Trump's antipathy to trade deals and his sniping at European and Asian allies. Pundits question whether members will tire of his excesses and pro-Moscow outlook, and point to soon-to-be Vice President Mike Pence as a potential successor.
"Trump gives the far-right most of the policies that it wants, but he's also deeply problematic," Jonathan Cristol, a fellow at the World Policy Institute think-tank, told Al Jazeera. "Pence will also deliver what they want, while also being a typical, bland, mid-western, far-right-leaning Republican."
4. Democrats
The election effectively handed Republicans dominance of the White House, Congress and Supreme Court. Many Democrats are now second-guessing the choice of Hillary Clinton to run against Trump over the affable leftist Bernie Sanders, and wondering whether the party should swing left.
Dozens of Democrat politicians will boycott the inauguration as the Trump backlash begins.
"The Democrats went into post-election shock, but that will wear off as they retreat, strategise, get re-energised and return," said Martin. "They won the popular vote in November and will look to make significant gains in the House of Representatives in the 2018 mid-term elections."
5. Liberal mayors
Democrats lost big in the election, but still hold sway in New York, Los Angeles, San Francisco and other US metropolises. These hubs have track records for blocking federal government immigration crackdowns and have earned monikers as "sanctuary cities".
Trump, meanwhile, has talked of deporting "bad hombres" among the US' 11 million undocumented migrants, creating Muslim registries and re-introducing the "stop-and-frisk" policing tactic that can single out blacks and Latinos.
New York Mayor Bill de Blasio rejected such policies and said he would refuse to let Trump "tear families apart". Other Democrat mayors agreed, and can limit cooperation with the US Department of Immigration and Customs Enforcement and other deportation agencies.
"If mayors stand up, like so many have, we can block deportation forces from entering our cities, looking for undocumented people, kicking down doors and breaking up families," Cathy Schneider, an urban politics scholar at American University, told Al Jazeera.
"Our cities must become bastions of protection for our citizens and immigrants."
Washington can retaliate by freezing funds to defiant mayors, but the outcome would be unpredictable and messy. "It's hard to say who would win, but the administration must pick its battles carefully," added Martin.
6. Spymasters
Intelligence chiefs are doubtless bad people to irk.
But, sadly for Trump, his kudos among pop stars is not his biggest problem. The president-elect will take the oath of office on January 20 amid widespread scepticism from the public and with ready-made enemies in US spy agencies, the business community and even his own Republican Party.
INTERACTIVE: Donald Trump's cabinet picks - Who's who?
On the surface, Trump's feisty use of Twitter and his bullish handling of reporters at a recent press conference make him look the alpha male. But his bravado masks vulnerabilities seldom seen by those about to enter the Oval Office.
Before the billionaire property magnate is sworn in on the steps of the US Capitol on Friday, Al Jazeera spoke to Washington insiders about the headaches Trump is likely to suffer during his first 100 days of rolling out plans to make America great again.
1. Public opinion
Trump lost the popular vote on November 8 by 2.9 million votes, only winning the election via a superior tally in the Electoral College. The latest CBS News poll showed only 32 percent of respondents had a favourable view of him, lower than George W Bush (44 percent) and Obama (60 percent) when they were first sworn in.
According to Pew Research Center, most Americans want Trump to publish his tax returns, worry about him using the Oval Office to line his pockets and think he has explained his policy goals poorly. Others fret about his impulsive behaviour, which was on show again with recent Twitter tirades against the actress Meryl Streep, and John Lewis, a civil rights icon.
Trump's efforts to reopen factories on US soil are popular in mostly white rust-belt zones, but his appeal in these areas may ebb as he cuts healthcare plans for the poor. "Those who voted for him will soon see that his policies will impact them negatively as well," Susan Smith, from the Muslim Peace Fellowship, a think-tank, told Al Jazeera.
2. Protesters
Not everyone heading to Washington on Friday will cheer the 45th president's oath-taking. Officials have struggled to find enough space for protesters to stage some 25 rallies over the weekend. The biggest is the Women's March on Washington, which will draw some 200,000 people decrying threats to abortion laws, affordable healthcare and equal pay.
OPINION: The prospect of the US as a 'banana republic'
Other groups will spotlight everything from ending war to legalising marijuana. Environmentalists are irked by Trump's claim that climate change is a Chinese hoax. Big rallies will also take place in Los Angeles, Chicago and other major cities in the US and globally.
Veteran protester Paul Kawika Martin, from the anti-war group Peace Action, was sceptical about the impact of rallies, which are not likely to match the scale of those against the Iraq War of 2003. "Big street protests are slowly going the way of dinosaurs," Martin told Al Jazeera.
Others activists, such as Khury Petersen-Smith, praise recent gains made by the Black Lives Matter race justice movement and the Standing Rock oil pipeline protests.
"We cannot only put our faith in elected officials," Petersen-Smith told Al Jazeera. "We need to harness grassroots power, keep immigration police out, turn college campuses into sanctuaries and work locally to create pockets of resistance."
Of course, hundreds of thousands of others will head to the capital to root for the next commander-in-chief, including the motorcycle cavalcade Bikers for Trump and the attendees of the
3. Republicans
Trump's fans were always the grassroots folk who turned out in droves to his campaign rallies, not well-heeled apparatchiks in Washington. The latter would have preferred Jeb Bush, Marco Rubio or another established Republican candidate to lead the party.
US: Political art artists making noise against Trump [2:09]
That said, members are broadly falling into line behind Trump in pursuit of nixing Obamacare and other bullet points on the right's agenda. But troubles persist. Rubio and John McCain, an Arizona senator, kicked up a fussduring hearings for Trump's appointees.
They worry about Kremlin-backed hackers swinging the election and Trump's admiration of Russian President Vladimir Putin. Others fear Trump's antipathy to trade deals and his sniping at European and Asian allies. Pundits question whether members will tire of his excesses and pro-Moscow outlook, and point to soon-to-be Vice President Mike Pence as a potential successor.
"Trump gives the far-right most of the policies that it wants, but he's also deeply problematic," Jonathan Cristol, a fellow at the World Policy Institute think-tank, told Al Jazeera. "Pence will also deliver what they want, while also being a typical, bland, mid-western, far-right-leaning Republican."
4. Democrats
The election effectively handed Republicans dominance of the White House, Congress and Supreme Court. Many Democrats are now second-guessing the choice of Hillary Clinton to run against Trump over the affable leftist Bernie Sanders, and wondering whether the party should swing left.
Dozens of Democrat politicians will boycott the inauguration as the Trump backlash begins.
"The Democrats went into post-election shock, but that will wear off as they retreat, strategise, get re-energised and return," said Martin. "They won the popular vote in November and will look to make significant gains in the House of Representatives in the 2018 mid-term elections."
5. Liberal mayors
Democrats lost big in the election, but still hold sway in New York, Los Angeles, San Francisco and other US metropolises. These hubs have track records for blocking federal government immigration crackdowns and have earned monikers as "sanctuary cities".
Trump, meanwhile, has talked of deporting "bad hombres" among the US' 11 million undocumented migrants, creating Muslim registries and re-introducing the "stop-and-frisk" policing tactic that can single out blacks and Latinos.
New York Mayor Bill de Blasio rejected such policies and said he would refuse to let Trump "tear families apart". Other Democrat mayors agreed, and can limit cooperation with the US Department of Immigration and Customs Enforcement and other deportation agencies.
"If mayors stand up, like so many have, we can block deportation forces from entering our cities, looking for undocumented people, kicking down doors and breaking up families," Cathy Schneider, an urban politics scholar at American University, told Al Jazeera.
"Our cities must become bastions of protection for our citizens and immigrants."
Washington can retaliate by freezing funds to defiant mayors, but the outcome would be unpredictable and messy. "It's hard to say who would win, but the administration must pick its battles carefully," added Martin.
6. Spymasters
Intelligence chiefs are doubtless bad people to irk.
Trump did just this when he said he was a "smart person" who did not need the daily intelligence digests that his predecessors received. This month, US spooks said Russia tried to sway the election outcome in Trump's favour by hacking and other means.
Trump rejected their conclusion and slammed them for the bogus reports of mass-casualty weapons that led to the Iraq war. His links to Moscow faced renewed scrutiny after an unsubstantiated report that Russia had compromising evidence against Trump.
"We will see more leaks to the press about the ineptitude of the Trump administration and about Trump's ties to Russia as time goes by," said Cristol.
Washington bureaucrats are not likely to confront Trump directly, but have other weapons, said Martin. "They know the system and how to resist what they don't like. We see this happening in the intelligence community already; and there's more pushback to come."
7. Corporations
So far, businesses are dancing to Trump's beat. General Motors, Wal-Mart and others have announced plans for job-creation or re-locating factories to US soil. This is in line with Trump's plans to create US jobs and build home-grown manufacturing by taxing imports.
They also fear his wrath: Trump's criticism that drug firms were over-charging for medicines saw their stock tumble. It works for now, but executives may turn on Trump should his mooted trade war with China go awry, disrupt the global supply chains that enable much US business and ultimately hurt US workers.
"If Trump messes up the world economy, there'll be lots of rich, powerful corporations with legions of lobbyists to resist him," said Martin.
Trump rejected their conclusion and slammed them for the bogus reports of mass-casualty weapons that led to the Iraq war. His links to Moscow faced renewed scrutiny after an unsubstantiated report that Russia had compromising evidence against Trump.
"We will see more leaks to the press about the ineptitude of the Trump administration and about Trump's ties to Russia as time goes by," said Cristol.
Washington bureaucrats are not likely to confront Trump directly, but have other weapons, said Martin. "They know the system and how to resist what they don't like. We see this happening in the intelligence community already; and there's more pushback to come."
7. Corporations
So far, businesses are dancing to Trump's beat. General Motors, Wal-Mart and others have announced plans for job-creation or re-locating factories to US soil. This is in line with Trump's plans to create US jobs and build home-grown manufacturing by taxing imports.
They also fear his wrath: Trump's criticism that drug firms were over-charging for medicines saw their stock tumble. It works for now, but executives may turn on Trump should his mooted trade war with China go awry, disrupt the global supply chains that enable much US business and ultimately hurt US workers.
"If Trump messes up the world economy, there'll be lots of rich, powerful corporations with legions of lobbyists to resist him," said Martin.
Gambia crisis: Jammeh given last chance to resign as troops close in
West African leaders have given Yahya Jammeh a final opportunity to relinquish power after Senegalese troops entered The Gambia.
Mr Jammeh has been given until noon on Friday to leave office or be forced out by UN-backed regional forces.
Troops have been told to halt their advance until the deadline passes.
The Economic Community of West African States (Ecowas) is acting in support of Adama Barrow, who was sworn in as the new Gambian president on Thursday.
His legitimacy as president, after winning last month's election, has been recognised internationally.
Last-ditch mediation talks, led by Guinea's President Alpha Conde, are due on Friday morning.
Chairman of the Ecowas commission, Marcel Alain de Souza, said that if the meeting with Mr Conde proved unsuccessful, militarily action would follow.
"If by midday, he [Mr Jammeh] doesn't agree to leave The Gambia under the banner of President Conde, we really will intervene militarily," he said.
Ecowas said that its forces had encountered no resistance after entering The Gambia on Thursday.
Troops from Senegal and other West African countries crossed into The Gambia after an initial deadline for Mr Jammeh to stand down passed with his resignation.
Mr Barrow, who remains in Senegal, has said that he will not return to Gambia's capital, Banjul, until the military operation had ended.
The threat by the West African regional bloc Ecowas to remove Mr Jammeh by force is supported by the 15-member UN Security Council, although the council has stressed that a political solution should be the priority.
A Senegalese army spokesman, Col Abdou Ndiaye, told the BBC that troops who were now in The Gambia were prepared to fight if necessary.
"It is already war, if we find any resistance, we will fight it," he said, adding: "If there are people who are fighting for the former president, we will fight them."
But Col Ndiaye said the main goal of Ecowas was to restore democracy and to allow the newly-elected president to take power.
In his inaugural speech at the Gambian embassy in Senegal's capital, Dakar, President Barrow ordered all members of The Gambia's armed forces to remain in their barracks.
Any found found illegally bearing arms would be considered "rebels", he said.
Why is Mr Jammeh refusing to go?
After first accepting defeat he reversed his position and said he would not step down. He declared a 90-day state of emergency, blaming irregularities in the electoral process.
The electoral commission accepted that some of its early results had contained errors but said they would not have affected Mr Barrow's win.
Mr Jammeh has said he will stay in office until new elections are held.
Remaining in power would also give him protection against prosecution for alleged abuses committed during his rule.
Mr Jammeh has been given until noon on Friday to leave office or be forced out by UN-backed regional forces.
Troops have been told to halt their advance until the deadline passes.
The Economic Community of West African States (Ecowas) is acting in support of Adama Barrow, who was sworn in as the new Gambian president on Thursday.
His legitimacy as president, after winning last month's election, has been recognised internationally.
Last-ditch mediation talks, led by Guinea's President Alpha Conde, are due on Friday morning.
Chairman of the Ecowas commission, Marcel Alain de Souza, said that if the meeting with Mr Conde proved unsuccessful, militarily action would follow.
"If by midday, he [Mr Jammeh] doesn't agree to leave The Gambia under the banner of President Conde, we really will intervene militarily," he said.
Ecowas said that its forces had encountered no resistance after entering The Gambia on Thursday.
Troops from Senegal and other West African countries crossed into The Gambia after an initial deadline for Mr Jammeh to stand down passed with his resignation.
Mr Barrow, who remains in Senegal, has said that he will not return to Gambia's capital, Banjul, until the military operation had ended.
The threat by the West African regional bloc Ecowas to remove Mr Jammeh by force is supported by the 15-member UN Security Council, although the council has stressed that a political solution should be the priority.
A Senegalese army spokesman, Col Abdou Ndiaye, told the BBC that troops who were now in The Gambia were prepared to fight if necessary.
"It is already war, if we find any resistance, we will fight it," he said, adding: "If there are people who are fighting for the former president, we will fight them."
But Col Ndiaye said the main goal of Ecowas was to restore democracy and to allow the newly-elected president to take power.
In his inaugural speech at the Gambian embassy in Senegal's capital, Dakar, President Barrow ordered all members of The Gambia's armed forces to remain in their barracks.
Any found found illegally bearing arms would be considered "rebels", he said.
Why is Mr Jammeh refusing to go?
After first accepting defeat he reversed his position and said he would not step down. He declared a 90-day state of emergency, blaming irregularities in the electoral process.
The electoral commission accepted that some of its early results had contained errors but said they would not have affected Mr Barrow's win.
Mr Jammeh has said he will stay in office until new elections are held.
Remaining in power would also give him protection against prosecution for alleged abuses committed during his rule.
Senegal troops invade The Gambia as Adama Barrow sworn in as President
Senegalese troops have invaded The Gambia to get the country's former leader to cede power to newly-inaugurated president Adama Barrow.
Former president Yahya Jammeh has refused to step down from office, saying he does not accept the result of an election held in December.
The United Nations Security Council has backed the efforts of the west African bloc of nations, ECOWAS, to remove Jammeh from power by force.
It comes just hours after Mr Barrow was sworn in as president at The Gambia's embassy in Senegal.
Mr Barrow said his inauguration was "a victory of the Gambian nation".
He said: "Our national flag will fly high among those of the most democratic nations of the world."
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Mr Barrow, 51, also warned armed forces to "remain in their barracks" and said anyone "found wanting or in possession of firearms without my order will be considered rebels".
According to news agency AFP, Gambian army chief Ousman Badjie said he would not engage his soldiers in a "political dispute".
Reporting from Gambian capital Banjul, Sky News Chief Correspondent Stuart Ramsay said thousands of people had flocked to the streets in "remarkable scenes".
He said: "People are beeping their horns, there are a lot of people waving to people trying to drive by.
"We have seen some soldiers being deployed in certain areas but they don't seem to be intervening in any particular way."
He added: "There doesn't seem to be any violence per se but lots of people are shouting and celebrating what they see as a change of power."
Earlier this week, the political crisis prompted the evacuation of thousands of Britons from The Gambia as the threat of a military action grew.
Until a matter of months ago Mr Barrow was a political unknown, but was thrust into the limelight when eight opposition parties put him forward as a unifying figure.
The 51-year-old lived in Britain for three-and-a-half years when he was younger, and worked at an Argos store in London.
In a statement, Foreign Secretary Boris Johnson urged Jammeh to step aside "to allow an orderly transition".
He said: "The elections...were free and fair, and an orderly expression of democratic choice by the Gambian people.
"They represent a new chapter in the country's history and an opportunity for change in The Gambia."
The United Nations Security Council has backed the efforts of the west African bloc of nations, ECOWAS, to remove Jammeh from power by force.
It comes just hours after Mr Barrow was sworn in as president at The Gambia's embassy in Senegal.
Mr Barrow said his inauguration was "a victory of the Gambian nation".
He said: "Our national flag will fly high among those of the most democratic nations of the world."
Yahya Jammeh: The Gambian President who claimed to cure AIDS
Mr Barrow, 51, also warned armed forces to "remain in their barracks" and said anyone "found wanting or in possession of firearms without my order will be considered rebels".
According to news agency AFP, Gambian army chief Ousman Badjie said he would not engage his soldiers in a "political dispute".
Reporting from Gambian capital Banjul, Sky News Chief Correspondent Stuart Ramsay said thousands of people had flocked to the streets in "remarkable scenes".
He said: "People are beeping their horns, there are a lot of people waving to people trying to drive by.
"We have seen some soldiers being deployed in certain areas but they don't seem to be intervening in any particular way."
He added: "There doesn't seem to be any violence per se but lots of people are shouting and celebrating what they see as a change of power."
Earlier this week, the political crisis prompted the evacuation of thousands of Britons from The Gambia as the threat of a military action grew.
Until a matter of months ago Mr Barrow was a political unknown, but was thrust into the limelight when eight opposition parties put him forward as a unifying figure.
The 51-year-old lived in Britain for three-and-a-half years when he was younger, and worked at an Argos store in London.
In a statement, Foreign Secretary Boris Johnson urged Jammeh to step aside "to allow an orderly transition".
He said: "The elections...were free and fair, and an orderly expression of democratic choice by the Gambian people.
"They represent a new chapter in the country's history and an opportunity for change in The Gambia."
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