Romney, while imperfect, was a Republican his whole life with executive experience. Also well-informed and sharp as a tack. Trump, a proud ignoramus who would fail a pop quiz on civics or the names of world leaders, has been a Republican for like five minutes. And no, it's not enough for him to be conservative on one out of 10 issues. In reality, he's a social liberal (planned parenthood!) with a disturbing authoritarian streak. Nor did Romney ever refer to his junk at a debate.
If I’m expected to vote for Trump or else I’m not a Republican, that’s fine by me. I will vote, or not vote, for anybody I damn well please.