
Huntsman is out. I agree with Scalzi that he decided to cut his losses early and is probably angling for a Secretary of State position in a Romney administration. IMO he has the experience, the balls, and the brains to be a good one.
Romney took several solid hits in the debate but sadly they were delivered by Gingrich. The evangelicals decided they were backing Santorum, which means the votes of the not-Romney bloc are going to remain divided. Gingrich's good showing in the debate comes at Santorum's expense and is a gift to the Republican power-brokers who can (and should) see a Romney->Gingrich->Santorum finish order as a clear sign of the weakness of the evangelical contingent in the party. Unless Romney continues sleepwalking (and maybe even if he does) I don't see Gingrich beating him in SC. A G-R-S finish is just barely possible if the debate goes very badly for Romney, very well for Gingrich, and the Tea Party throws its weight behind Gingrich. Much more likely is R-G-S in which case the question remains how much above 25% can Romney get.
On the longer view, Gingrich's biggest haymaker against Romney is still the financial/tax returns issue, which is a very poor strategic bet for him to make. He can't beat Romney this way.