Donald Trump softens stance on torture and illegal immigration

"This little guy has lied so much about my record", Trump said in response to Rubio, adding that he had begun bringing some clothing operations home from overseas.

With the real-estate tycoon apparently on a glide path to becoming the Republican standard-bearer, Trump faced a day of relentless criticism from party leaders, with some panic setting in at the prospect of nominee Trump.

With Trump and his three Republican rivals-Sen.

During the Republican debate, Trump pointed out there was "no problem" with the size of his hands or any other part of his anatomy.

Trump also used the beginning of the debate to hit back at allegations he has small hands, stating "Look at these hands - are they small hands?"

"If they are small, something else must be small".

Rubio excused his own attacks by insisting it was Trump who opened the floodgates.

He said it would be "defeatist" to support anyone but Rubio. In the last two Republican debates, Trump broke even in terms of positive and negative mentions, according to the firm's analysis, while he enjoyed a 62.5 percent positive sentiment rating during the Republican debate before that. "Let's say they get together and form a ticket, that's how politics works", said Romney.

"I hope we don't see yoga on this stage", Cruz said.

"People say wherever I go: 'You seem to be the adult on the stage'".

Romney said a Trump nomination would enable a Democratic victory for the party's presumptive nominee, Hillary Clinton.

Ted Cruz has found plenty of ammunition in Trump University to use against GOP rival Donald Trump.

During an interview with the FOX Business Network's Neil Cavuto, former presidential candidate and Massachusetts Governor Mitt Romney explained why he is speaking out about Donald Trump.

Romney ruled out a scenario of being the nominee and advancing himself.