FILE – In this Feb. 8, 2012, file photo Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, is prayed over at the Bella Donna Chapel in McKinney, Texas, after he spoke there. Across all states where Republican primary voters were asked their religion in exit polls, Mitt Romney, a Mormon, trounced Santorum among Catholics, with an average margin of victory above 20 percentage points. Even in Southern states, where Romney has struggled, Catholics broke his way. Sunday, March 18, overwhelmingly Catholic Puerto Rico is holding its primary. (AP Photo/Rex C. Curry, File)