[DoctorQuquriramba]

Bush daughter on the right is pretty hot. The one on the left isn't.

In response to the OP" know one knows. It's too wide open, and too many of the candidates have big weaknesses as far as primaries.

McCain has the biggest name recognition, but he has managed to anger everyone, and he has flip-flopped enough to have lost most of his "straight talk" credibility.

Guliani has name recognition and appeal to the moderates, but his pro-Abortion social positions will alienate the Christian right.

Mike Huckabee is an affable fellow with executive experience. He's right wing socially, but his populist politics and his history of raising taxes will alienate the free market and libertarian Republicans.

Tom Tancredo will strongly appeal to the populist right and the Lou Dobbs crowd, but he'll be seen as too far right to be electable.

Jeb Bush would be the candidate most Republicans would prefer, but the Bush name makes him totally unelectable.

I don't know about other candidates / potential candidates.

Edit:

I forgot Mitt Romney. He has executive experience, but he is socially moderate, seen as a tax raiser, and is a Mormon to boot. He'll likely scare off both the Christian conservatives (who don't see Mormonism as Christian) and the economic right wingers.