Trump aide thanks Romney for 'incredible endorsement'

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A top aide to White House hopeful Donald TrumpDonald TrumpMcConnell: Trump’s still not credible Trump tweets poll that shows him trailing Clinton Poll: Europeans have little confidence in Trump MORE on Thursday thanked Mitt Romney after the 2012 Republican presidential nominee blasted the current GOP front-runner.

Dan Scavino, a senior Trump adviser, tweeted that the former Massachusetts governor had delivered "an incredible endorsement" for Trump.

Scavino also tweeted that Romney "defined" the word politician with his remarks, linking to a a video from 2012 when Romney said he was "honored and pleased" to have Trump's endorsement in his own presidential bid.

Many political observers say Romney's address could play into Trump's hand, given Romney's status in the GOP establishment and Trump's campaign as a political outsider.

Romney during a blistering speech Thursday at the University of Utah unloaded on Trump's foreign policy credibility, business failures and vision for the country.

Romney ripped Trump as a "fraud" and "phony" in his speech, and called on Republicans to support rivals Ted CruzTed CruzTwo transgender candidates win primaries Trump denies tapping Mike Tyson for convention Cruz-backed candidate wins GOP primary in Colorado MORE, Marco RubioMarco RubioEXCLUSIVE: Pro-Hillary group takes 0K in banned donations Poll: Rubio, Murphy neck-and-neck in Florida Senate race Overnight Healthcare: Blame game over Zika funding MORE or John Kasich in voting over the next two weeks.

--This report was updated at 12:35 p.m.

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