Michele Norris talks with Bruce Ransom, a professor of political science at Clemson University in Clemson, S.C. Ransom's poll on the Democratic race in South Carolina came out Thursday. It shows Barack Obama leading with 27 percent, Hillary Clinton second with 20 percent and John Edwards gaining with 17 percent. Edwards had just 12 percent in a previous poll. A huge number of people — some 36 percent — are still calling themselves undecided or refuse to answer the poll.