To match Special Report USA-CAMPAIGN/SANTORUM

 
To match Special Report USA-CAMPAIGN/SANTORUM
Republican presidential candidate and former Senator Rick Santorum speaks during the Southern Republican Leadership Conference in Charleston, South Carolina in this January 19, 2012 file photo. Santorum's 2012 run for the republican presidential nomination has, so far, resembled his previous political campaigns: swinging from underdog highs to self-defeating lows. REUTERS/Chris Keane/Files