Republican presidential candidate, former Pennsylvania Sen. Rick Santorum signs his autographs in Sparta, Wis., Wednesday, March 28, 2012. (AP Photo/Jae C. Hong)

Associated Press
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum signs his autographs in Sparta, Wis., Wednesday, March 28, 2012. (AP Photo/Jae C. Hong)
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum signs his autographs in Sparta, Wis., Wednesday, March 28, 2012. (AP Photo/Jae C. Hong)
View Comments (0)