Republican presidential candidate Rick Santorum, left, talks with Ralph Reed at the Faith & Freedom Coalition Prayer Breakfast in Myrtle Beach, South Carolina, on Sunday, January 15, 2012. (Janet Blackmon Morgan/The Sun News/MCT)
Republican presidential candidate Rick Santorum, left, talks with Ralph Reed at the Faith & Freedom Coalition Prayer Breakfast in Myrtle Beach, South Carolina, on Sunday, January 15, 2012. (Janet Blackmon Morgan/The Sun News/MCT) Janet Blackmon Morgan / The Sun News / MCT
Republican presidential candidate Rick Santorum, left, talks with Ralph Reed at the Faith & Freedom Coalition Prayer Breakfast in Myrtle Beach, South Carolina, on Sunday, January 15, 2012. (Janet Blackmon Morgan/The Sun News/MCT) Janet Blackmon Morgan / The Sun News / MCT

Predicting the South Carolina GOP vote is a challenge

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