It's not about Romney winning its about him pre occupying trump and weakening him in the general. No republican incumbent that has been primaried won re election. Plus as I said it would be funny.
I'm aware Romney is a Mormon. I didn't say he was evangelical. Trump as far as I recall isn't evangelical either. They however could certainly back Romney over trump if he has his same policy on Israel and on moral matters that matter to them. They hate trump but tolerate him because he can get them what he wants. They actually like Romney
https://www.christianitytoday.com/c...als-were-quite-enthusiastic-about-romney.html
Why do you think he didn't start attacking Romney like. Everyone else. Such a measured calm response. Romney could really rattle him and I think that niche of voters would be key