Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, speaks to an audience at a town hall meeting in San Juan, Puerto Rico, Wednesday March 14, 2012. (AP Photo/Dennis M. Rivera Pichardo)

Associated Press
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, speaks to an audience at a town hall meeting in San Juan, Puerto Rico, Wednesday March 14, 2012. (AP Photo/Dennis M. Rivera Pichardo)
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, speaks to an audience at a town hall meeting in San Juan, Puerto Rico, Wednesday March 14, 2012. (AP Photo/Dennis M. Rivera Pichardo)
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