6 / 14

Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, and his wife Karen, make a campaign stop at McElroy's On the Bayou, Monday, March 12, 2012, in Ocean Springs, Miss. (AP Photo/Eric Gay)

Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, and his wife Karen, make a campaign stop at McElroy's On the Bayou, Monday, March 12, 2012, in Ocean Springs, Miss. (AP Photo/Eric Gay)

Republicans campaign in Deep South

Republicans Rick Santorum, Newt Gingrich and Mitt Romney battle for conservative support in Mississippi and Alabama ahead of presidential primaries Mar. 13. Polls show it has turned into a tense three-way tie.