Trump: Expect Riots If I'm Not Nominated

Donald Trump says there will be "riots" if the Republican party thwarts his bid to be its presidential candidate.

The property magnate's chances of winning the party's nomination were boosted on Tuesday after critical victories in five state primaries.

But, after third place John Kasich won his home state of Ohio, front runner Mr Trumpexpressed concern he could be shut out.

The governor and former congressman took dozens of the delegates Mr Trump needs to be automatically appointed as his party's candidate in July.

Analysts say that if Mr Trump does not win the 1,237 delegates he needs for a nomination, he would have to convince a Republican convention he is the man for the job.

With many conservative figures hostile to Mr Trump, it is thought some may seek to do a deal that results in the convention backing another candidate - eliminating the businessman.

Mr Trump told CNN, after his wins in Florida, Illinois and North Carolina on Tuesday night:  "The really big story is how many people are voting in these primaries.

"If you just disenfranchise these people, I think you would have problems like you've never seen before."

He said he couldn't imagine failing to get the party's nomination, adding that he "(didn't) even want to think about" what he would do.

"We'd have riots," he said.

In other developments:

:: The Republican debate that Fox News was to host on Monday in Salt Lake City, Utah, has been cancelled after Mr Trump and Mr Kasich said they would not attend

:: Florida Governor Rick Scott endorsed Mr Trump a day after the billionaire won that state's primary, urging Republicans to "accept and respect the will of the voters"

Mr Kasich, who lies third in the Republican contest behind Texas Senator Ted Cruz told NBC that "nobody is going to have enough delegates" by the time the Republican National Convention takes place this summer.

There are 21 states still to vote in primaries and caucuses, with Mr Trump currently on 661 delegates, Mr Cruz on 406 and John Kasich on 142.

The Republican result was delayed in Missouri where Mr Trump was neck and neck with Mr Cruz.

Marco Rubio, who was heavily defeated in his home state of Florida, dropped out.

In the Democratic contest, Hillary Clintonclaimed a clean sweep ahead of her opponent Bernie Sanders in Florida, Ohio, Illinois, North Carolina and Missouri.