Former Pennsylvania Sen. Rick Santorum addresses the Republican National Convention in Tampa, Fla., on Tuesday, Aug. 28, 2012. (AP Photo/J. Scott Applewhite)

 

              Former Pennsylvania Sen. Rick Santorum addresses the Republican National Convention in Tampa, Fla., on Tuesday, Aug. 28, 2012. (AP Photo/J. Scott Applewhite)
Former Pennsylvania Sen. Rick Santorum addresses the Republican National Convention in Tampa, Fla., on Tuesday, Aug. 28, 2012. (AP Photo/J. Scott Applewhite)