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With Newt Gingrich beating Mitt Romney in South Carolina as soundly as the Johnny Rebels in 1861 thrashed the Billy Yanks at Bull Run (or the First Battle of Manassas, depending on your view), the Republican presidential nomination contest marches southward to Florida.

There in the Sunshine State, the campaign promises to be an even more hard- fought affair than in South Carolina, with both candidates battling for their party's conservative soul by out-righting each other.

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.

The morning after a stinging defeat in South Carolina, former Massachusetts Gov. Mitt Romney said he would release his most recent tax returns this week, ahead of the Florida primary.

Romney said he would release his 2010 tax returns and an estimate of what he'll pay for 2011 on Tuesday. "We made a mistake in holding off as long as we did," he told Fox News Sunday.

Komotini is a village in the Greek province of Thrace. Its Muslim population dates back to the time of Ottoman occupation. They still speak Turkish and Shariah law still applies to Muslim residents in family matters, a state of affairs that has inflamed some politicians in Athens. Meanwhile, residents say their bigger problem is poverty.

NPR's Tamara Keith reports on former Speaker Newt Gingrich's finish in Saturday's South Carolina primary.