Future of Republican Presidential Candidates

Wednesday, 4 Jan 2012 | 7:03 AM ET

The details behind Mitt Romney's campaign, that helped his victory in Iowa, with John Podesta, Center for American Progress, who weighs in on whether Rick Santorum will win over South Carolina's conservative voters; CNBC's John Harwood & Larry Kudlow share the highlights from Iowa and weigh in on whether Rick Santorum will be able to sell his tax plan going forward with his campaign.