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Republican presidential candidate, former House Speaker Newt Gingrich, left, and his wife Callista wave as they arrive for a Super Tuesday rally on Tuesday, March 6, 2012 in Atlanta. (AP Photo/Evan Vucci)

Republican presidential candidate, former House Speaker Newt Gingrich, left, and his wife Callista wave as they arrive for a Super Tuesday rally on Tuesday, March 6, 2012 in Atlanta. (AP Photo/Evan Vucci)

Scenes from Super Tuesday

Republicans in 10 states weighed in on the GOP presidential nomination race in its busiest day yet. Mitt Romney won six states, Rick Santorum clinched three and Newt Gingrich prevailed in one.