Do you really think he would fare better than Kasich? Don't get me wrong. He wasn't a bad governer. But he's a yuge phony, and most on the right and the left know that. As a Pub, he was a successful moderate governer of a liberal state, much like Charlie Baker or Larry Hogan. But then he had to kiss up to the religious right in order to get the Pub nomination and change a bunch of his positions, just like McCain did 4 years before that. Trump's base knows that and hates him. Sure, establishment and libertarian leaning Pubs would show up in a primary to vote for him, but they are now only a fairly significant minority in their own party. In a Romney/Trump match-up, Romney would win UT, much of the rest of the mountain west, VA, maybe MD, NY, NJ and much of New England. But he'd get slaughtered in the entire midwest, southeast and southwest. Romney is the Pub version of John Edwards.