About a 10 percent chance, which would only happen if Hillary or Obama screw up badly somehow.
Huckabee is a new face so even if he made it to the nomination he'd be ripe for a self-inflicted fatal mistake and between the msm and the democrats he would be defined for the american public as they chose to define him, most likely as a evangelical buffoon. Still he had the most potential of the candidates left.
Romney has cash and might stand a small shot - but his mormon roots will hurt him, especially in the bible belt, and he elicits no passion amongst the republican parties conservative base.
Rudy - has no chance for the nomination - his big state gambit failed big time and no one wants him anymore, his time is long past.
McCain has a chance for the nomination, especially since conservatives are scrabbling to find anyone with the least shred of conservatism in them. However, McCain elicits passion in the party electorate like Bob Dole did and his democratic opponents are running to be either the first woman or the first black president, thus he loses the independent vote and gets a low turn out of the conservative base.
Ron Paul - republican party faithful and the party establishment would rather see Hillary or Obama or even Osama elected.
So, maybe 10 percent was a high estimate. If immigration was a real issue then the republicans might have had a chance, but of the candidates left none are really willing to address it or make it an issue. (well paul is but he doesn't count).
Given either Hillary or Obama I would say Hillary would be better for conservatives as she is less liberal than Obama, she already has hard core enemies in her own party, she is not charismatic like Obama, and she will not have the pc protection that Obama would have as president (i.e. if you oppose him or his policies you are a racist, I can already see the republicans running away from fight after fight). Therefore Hillary would have a harder time getting things done since she is such a devisive figure, Obama could steamroll his opposition, (he seems so nice on tv, he only wants what is best, we should give the new president a chance to get his programs passed, you are so mean to oppose him, I like him, why can't you get along with him and work together like he says, are you a racist is that really why you don't like him and won't help him to do what is right). :barf:
As for me, I voting for Paul in the primary and as a write in in the general.