Mitt Romney Lambasts Donald Trump As A 'Phony' And 'Fraud' In Blistering Speech

In his remarks, Romney offered praise for the three other GOP White House hopefuls who remain in the race: Florida Sen. Marco Rubio, Texas Sen. Ted Cruz and Ohio Gov. John Kasich.

"Donald Trump is a phony, a fraud," he said at the University of Utah. "His promises are as worthless as a degree from Trump University. He's playing the American public for suckers: He gets a free ride to the White House, and all we get is a lousy hat."

Romney added that Trump's "domestic policies would lead to recession. His foreign policies would make America and the world less safe. He has neither the temperament nor the judgment to be president. And his personal qualities would mean that America would cease to be a shining city on a hill."

The business mogul "relishes any poll that reflects what he thinks of himself. But polls are also saying that he will lose to Hillary Clinton," he said.