I think the problem the GOP would have if he choose to run is that he is not conservative enough for the far right of the party.
That's their problem in a nutshell, DM. No one is conservative enough for them. They want to run a revisionist combination of Ward Cleaver and John Wayne.
In short, they're insane.
"I got news for you. If it wasn't for the toilet, there would be no books." --- George Costanza.