Republican presidential candidate, former Massachusetts Gov. Mitt Romney, center, shops with his wife Ann, left, and Puerto Rican Gov. Luis Fortuno during a campaign stop Saturday, March 17, 2012 in ... more 
Republican presidential candidate, former Massachusetts Gov. Mitt Romney, center, shops with his wife Ann, left, and Puerto Rican Gov. Luis Fortuno during a campaign stop Saturday, March 17, 2012 in Bayamon, Puerto Rico. Puerto Ricans are U.S. citizens, but don't pay taxes and can't vote in U.S. presidential elections. But they can vote in primary nominating contests, and Republicans will hold their's Sunday. (AP Photo/Evan Vucci) less 
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Associated Press | Photo By Evan Vucci
Sat, Mar 17, 2012 2:20 PM EDT