Though really, I'd settle for a groundswell of McCain support among the centrist Republicans.
Blergh. The impression I've gotten of him from stories that go deeper than surface-level "Look at that crazy maverick! I bet he eats his salad with a spoon!" sycophancy is that he's not terribly principled except on a very, very few issues, usually ones in which he has some personal stake (like veterans' issues and torture). And his recent cringey Bush bootlicking after the nasty-ass way Bush surrogates smeared his entire family during the '00 primaries, the Bob Jones speaking engagement, and his totally unprovoked fuckwaddery toward Barak Obama make me queasy.
Not as queasy as "What about Bill Frist?", but still.