Rudy and Mitt, but who’s the third, IYHO? (I say it’s a two-man race, with Huckabee still having a remote shot at making it three.)
Don’t forget that Michigan’s in between NH and SC - and MI is in play on the GOP side. Unlike the Dems, they haven’t ruled it out of bounds, though MI may wind up with fewer delegates than otherwise. (Which won’t matter - the early primaries are about perception, not numbers.) And Romney’s the most likely beneficiary there (and Rudy second most likely), while the Huckster’s probably not going to even have a campaign organization in Michigan unless/until his strong second in Iowa gets him a boatload of contributions to enable him to have a presence there.
So it’s hard to see him getting a real strong bounce going into SC. And once there, SC isn’t just a fundy-friendly state, it’s also the home of dirty-trick campaigning. Rudy and Mitt already have their local attack dogs on staff; Huck won’t.
And of course all this is assuming NH is on January 8. We don’t know that for sure yet, and there’s reason to believe they might go with December 11, which would shake up everyone’s calculations, but would really hurt Huck, as he’s polling in single digits there.
I see Huckabee as being a credible running mate for Mitt, one who would be sufficiently philosophically compatible to be believable, and who would shore up Mitt’s cred with the evangelicals. (I’m not saying it’ll happen if Mitt’s the nominee; just that it’s a reasonable possibility.)
Other than that, I don’t see any possible pairings of announced candidates on the GOP side. Tancredo, Hunter, Keyes, and Paul are a nutcase squad. Rudy and McCain aren’t interested in being anyone’s second fiddle. Giuliani’s penchant for surrounding himself with yes-men suggests that he’s not going to pick someone who has his own base of support. Unless Gramps Thompson shows a spark of life sometime, it’s hard to see anyone being interested in nominating him for anything ever again. Mitt would probably accept the veep position, but it’s hard to see either Rudy or Huck offering him the position.
On the Dem side, no way Hillary’s gonna be second fiddle. Edwards (without saying it in so many words) has been standing up for the Democratic wing of the Democratic Party, and that won’t work well with Hillary. And Edwards is all about "take on the bad actors’ while Obama’s about uniting everyone, so Edwards will be neither Hillary’s nor Obama’s running mate.
There’s a slight chance, IMHO, of a Hillary-Obama ticket. There’s not that much philosophical difference between them, really. The problem is that when Obama finds his moral footing, he’s capable of giving speeches that outshine anyone else in American politics nowadays. Nobody wants a #2 that will upstage them.
Kucinich and Gravel are right out. That leaves Biden, Dodd, and Richardson.
I think Biden and Dodd are possible, but unlikely. They don’t add much to the ticket (hey, a Northeastern white male who’s been in the Senate forever without making many waves!) Edwards could conceivably pick Biden (to shore up his foreign policy cred) or Dodd (to reinforce the point that he’s willing to stand up for habeas and the Fourth Amendment), and Obama too might pick Biden for the foreign-policy cred.
Richardson, OTOH, is primo veep material for anyone. The GOP’s busily chasing the Hispanic vote away, but the Dems haven’t nailed it down yet. Nominating Richardson would go a long way there. Plus he’s been a Congressman, a governor, and served in Clinton’s cabinet.
Doesn’t mean he’ll be picked, of course. But IMHO, he’d be a very good pick, as well as a very plausible one.