Now that Mitt Romney has gone two for two in the first two Republican nominating contests, can anyone actually stop him? University of
Virginia Center for Politics Director Larry J. Sabato explains why South Carolina might be the last stand for his Republican rivals. Plus, more on the New Hampshire primary and questions from Twitter. To learn more about the GOP race, visit Sabato’s Crystal Ball at www.centerforpolitics.org/crystalball and sign up for the free Crystal Ball newsletter or follow @LarrySabato on Twitter.