.....one man leaves? Sorry, Republicans, you're not gonna be that lucky. First, Ron Paul is in for the duration, come Hell or high turn-out. Second, Gingrich's ego won't let him quit; even if all he wins is Georgia, he'll claim that as a basis for staying in until Texas, which is months away yet. Third, even if Santorum quits, that will make the mess worse, not better, since the anyone-but-Romney vote will finally unify behind Gingrich and pose a more effective challenge to Romney.
Ten states vote today: Alaska, Georgia, Idaho, Massachusetts, North Dakota, Ohio, Oklahoma, Tennessee, Vermont, and Virginia. Romney should win most of the states, but Georgia is Gingrich's home state, and Romney could well lose Oklahoma and Tennessee or even Ohio, which is being billed as the critical contest of the day. Virginia would have been a good possibility for Gingrich or Santorum if their campaigns hadn't been too incompetent to get them on the ballot. Even Paul has a chance in Alaska and North Dakota. And most delegates are being allocated proportionately rather than winner-take-all, so even if Romney wins in most places, everyone will pick up delegates.
I'm betting on Santorum to fade due to resentment over his robocall dirty trick in Michigan, and on Gingrich to do well enough to stay in despite the party establishment wishing he'd go away and get this thing over with. The Nutty faction of the Republicans is still not reconciled to Romney.
It's most interesting to follow the race on the right-wingers' own forums. Here are the ones I use to track commentary by the different factions:
Sane faction: Race42012, David Frum
Nutty faction: RedState
Ron Paul cult: Daily Paul
Unless, of course, there's another debate.
So have at it, and may all four of them lose.