Former Pennsylvania Senator Rick Santorum gives a thumbs up to delegates after his speech during the Republican National Convention in Tampa, Fla., on Tuesday, Aug. 28, 2012. (AP Photo/

 

              Former Pennsylvania Senator Rick Santorum gives a thumbs up to delegates after his speech during the Republican National Convention in Tampa, Fla., on Tuesday, Aug. 28, 2012. (AP Photo/
Former Pennsylvania Senator Rick Santorum gives a thumbs up to delegates after his speech during the Republican National Convention in Tampa, Fla., on Tuesday, Aug. 28, 2012. (AP Photo/Charlie Neibergall)