Gingrich's Win, Romney's Taxes And What They Mean

Republican presidential candidate Mitt Romney said Sunday he would release his 2010 tax returns on Tuesday. NPR's Ari Shapiro reports Romney is ceding to increased pressure that might have contributed to his loss in South Carolina's Primary. Guy Raz talks with NPR's senior Washington editor Ron Elving about Newt Gingrich's upset in South Carolina's primary and what it means for the GOP race.