Political panel: GOP presidential race down to the wire

The GOP presidential race is down to the wire, with just seven weeks to go until the the crucial Iowa caucasus.  The candidates squared off once again on Saturday in South Carolina, in a debate that focused on foreign policy – an issue that has largely taken a backseat in a presidential race shaped by the troubled economy.

Christine Romans speaks with Neera Tanden, president of the center for American Progress, and GOP strategist Ed Rollins about the state of the GOP field – and whether anybody can overtake Mitt Romney.