"Former Massachusetts Gov. Mitt Romney gives a speech about the state of the Republican Party during a forum at the University of Utah on March 3, 2016. Romney <a href=""http://www.cnn.com/2016/03/03/politics/mitt-romney-presidential-race-speech/index.html"" target=""_blank"">went after Trump, </a>calling the GOP front-runner a phony and a fraud. Trump hit back by mocking Romney's loss in the 2012 presidential election and saying that Romney back then ""was begging for my endorsement."""