Former Massachusetts gov. and Republican presidential candidate Mitt Romney celebrates his victory with his wife Ann in the Florida Republican Presidential Primary at the Tampa Convention Center.

Republican presidential candidate and former Massachusetts Governor Mitt Romney hugs his wife Ann as they hear him declared the winner of the Florida primary by television networks in Tampa.

Republican presidential candidate and former Speaker of the House Newt Gingrich and his wife Callista greet supporters and pose for photographs outside a polling place on primary day in Celebration, Fla.

Jean Richard-Houck sits on her mobility scooter as she watches Newt Gingrich greet voters at the Celebration Heritage Hall polling precinct in Celebration, Fla.

Republican presidential candidate and former Massachusetts Gov. Mitt Romney works the phones for votes at his campaign headquarters on Jan. 31, 2012 in Tampa, Fla. Romney has a double-digit lead going into the primary.

Republican presidential candidate and former Speaker of the House Newt Gingrich visits with people at Fred's Southern Kitchen on Jan. 31, 2012 in Plant City, Fla.

A voter arrives at a polling station on primary day on Jan. 31, in Tampa, Florida. Republican voters head to the polls as their party continues the process of deciding who will be their general election candidate against President Barack Obama.

Security guards for Republican presidential candidate and former Speaker of the House Newt Gingrich push Ron Paul supporter Eddie Dillard of Orlando away from Gingrich as he campaigns on primary day outside a polling place at First Baptist Church of Windermere on Jan. 31 in Orlando, Florida. Dillard had been at the polling place all morning when Gingrich stood in front of him to pose for photographs. Gingrich supporters then began shoving Dillard and stepping on his feet when security came over and pushed him back. Polls show Gingrich's fellow candidate, former Massachusetts Gov. Mitt Romney, with a double digit lead going into the Florida primary.

Activists from PETA dressed as pigs walk outside a polling precinct in Orlando, Florida on Jan. 31.

Ray Roy sets up a polling station as he prepares for voters on primary day on Jan. 31 in Tampa, Florida. Republican voters head to the polls as their party continues the process of deciding who will be their general election candidate against President Barack Obama.

Former Massachusetts Gov. Mitt Romney greets people during a grassroots rally with supporters at Lake Sumter Landing on Jan. 30, 2012 in The Villages, Fla. Romney is campaigning across the state ahead of the January 31 Florida primary.

People wait to hear Mitt Romney speak during a grassroots rally at Lake Sumter Landing in The Villages, Fla.

Supporters of Republican presidential candidate Newt Gingrich cheer as he arrives for a campaign rally at the Hyatt Regency in Jacksonville, Fla., on Monday, Jan. 30.

Mitt Romney supporters attend a rally at Ring Power Lift Trucks in Jacksonville on Jan. 30.

People listen to Mitt Romney during a rally at Ring Power Lift Trucks in Jacksonville on Jan. 30.

Republican presidential candidate Newt Gingrich and his wife, Callista Gingrich, listen as Michael Reagan, son of President Ronald Reagan, during a campaign rally on Monday in Jacksonville.

Mackenzie Tuttle, 8, sits with her family during a rally for Republican presidential candidate Newt Gingrich on Monday.

Republican presidential candidate Mitt Romney presents Los Angeles Times reporter Maeve Reston with a birthday cake on his campaign plane in Jacksonville on Monday.

Former Speaker of the House Newt Gingrich speaks during a campaign stop at Dolphin Aviation in Sarasota, Fla. on Jan. 24, 2012.

Republican presidential candidate and former Massachusetts Governor Mitt Romney delivers his pre-emptive rebuttal to U.S. President Barack Obama's State of the Union Speech in Tampa, Florida Jan. 24.

Republican presidential candidate former Massachusetts Governor Mitt Romney and former Speaker of the House Newt Gingrich debates on Monday night in Tampa, Fla.

Faces in the crowd at the NBC News, National Journal, Tampa Bay Times debate held at the University of South Florida on Jan. 23, 2012 in Tampa, Florida.

Supporters of Republican presidential candidate, Ron Paul drive down USF Holly Drive before the GOP presidential debate sponsored by NBC News at the University of South Florida in Tampa on Jan. 23. The debate is the first of two before the Florida primaries on Jan. 31.

Republican presidential hopeful Mitt Romney holds a round table on housing issues in Tampa on Jan. 23.

Volunteer Kevin Sasker hangs posters for Republican presidential hopeful Newt Gingrich during a campaign rally in Tampa on Jan. 23.

Presidential candidate and former Pennsylvania Senator Rick Santorum gets hit with glitter by two unidentified members of the crowd at a town hall meeting at the American Legion Hall in Lady Lake, Fla., on Jan. 23.

Republican presidential hopeful Mitt Romney addresses a primary election night rally in Columbia, S.C. on Jan. 21, 2012.