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)

Photo by: 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)