Scenes From the Mississippi and Alabama Primaries -- PICTURES

Newt Gingrich and his wife Callista greet supporters at his primary night election rally on Tuesday. (AP Photo/Butch Dill)

Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, hugs his wife Karen after speaking at his primary night watch party in Lafayette, La. (AP Photo/Gerald Herbert)

Rick Santorum delivers his victory speech in Louisiana.  (AP Photo/Gerald Herbert)

Republican presidential candidate Mitt Romney, accompanied by comedian Jeff Foxworthy, speaks during a campaign stop at the Whistle Stop Cafe, Monday, March 12, 2012 in Mobile, Ala.  (JOHN DAVID MERCER/AP)

Danny Cooper, of Chilton County, Ala., waves to motorists outside a polling place, Tuesday, March 13, 2012, in Vestavia Hills, Ala. (DAVID GOLDMAN/AP)

Republican presidential candidate Rick Santorum visits with supporters during a rally, Monday, March 12, 2012, in Montgomery, Ala. (ERIC GAY/AP)

Republican presidential candidate Newt Gingrich waits to be introduced at a campaign event, Tuesday, March 13, 2012, in Vestavia Hills, Ala. (DAVID GOLDMAN/AP)

A voter leaves a polling place in Birmingham, Ala., Tuesday, March 13, 2012. (DAVID GOLDMAN/AP)

Republican presidential candidate Rick Santorum talks with supporters during a stop at Sweet Peppers Deli in Tupelo, Miss., Sunday, March 11, 2012. (ERIC GAY/AP)