Republican presidential candidate Rick Santorum speaks during a campaign appearance at the National Sprint Car Hall of Fame Saturday, Dec. 31, 2011, in Knoxville, Iowa.
Republican presidential candidate Rick Santorum speaks during a campaign appearance at the National Sprint Car Hall of Fame Saturday, Dec. 31, 2011, in Knoxville, Iowa. AP
Republican presidential candidate Rick Santorum speaks during a campaign appearance at the National Sprint Car Hall of Fame Saturday, Dec. 31, 2011, in Knoxville, Iowa. AP

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