April 10, 2012
In this April 3, 2012 file photo, Republican presidential candidate, former Pennsylvania Sen. Rick Santorum speaks in Cranberry, Pa. Rick Santorum boasts that deep conservative values make him a stronger challenger against President Barack Obama this fall than likely GOP nominee Mitt Romney. (AP Photo/Jae C. Hong, File)
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Rick Santorum is suspending his campaign for the GOP presidential nomination, clearing a path for Mitt Romney to become the nominee.