For the second time in less than a week, the field of GOP presidential hopefuls will meet for a debate. This one takes place Monday in Tampa, Fla. And it's notable in that it's the first presidential debate with a Tea Party group as a co-sponsor. CNN is the media partner for the event. When the candidates squared off last week, there was some lively sparring over Social Security and health care. There will likely be more of that Monday. For more, Michele Norris talks to NPR's Don Gonyea.