If Santorum couldn't do any better than 15% in South Carolina, he's not going to be able to get it done nationally.
Gingrich is the only one who can bring together all three legs of the Reagan coalition, and then appeal to independents (if he can stay on task...)
He just piously sneaks around with no one attacking him and he and his supporters act like that means he’s “above the fray” and of course it’s not...he’s just not taken seriously by anyone.
Once he is attacked, with his liberal record on non social issues and this thin whiny skin - he’ll be in the 2% range in no time.