Republican presidential candidate, former Pennsylvania Sen. Rick Santorum gives a thumbs up during his election night party, Tuesday, March 13, 2012, in Lafayette, La. (AP Photo/Eric Gay)

Associated Press
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum gives a thumbs up during his election night party, Tuesday, March 13, 2012, in Lafayette, La.  (AP Photo/Eric Gay)
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum gives a thumbs up during his election night party, Tuesday, March 13, 2012, in Lafayette, La. (AP Photo/Eric Gay)
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