Comedian Stephen Colbert, left, holds a rally with former GOP presidential candidate Herman Cain at the College of Charleston in South Carolina. Richard Ellis/Getty Images hide caption

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Alexandra Ziegler, age 9, leafletting for Gingrich in Greenville, S.C. Melissa Block/NPR hide caption

itoggle caption Melissa Block/NPR

Supporters of Republican presidential candidate Mitt Romney laugh during a campaign event on Jan. 5 in Charleston, S.C. Richard Ellis/Getty Images hide caption

itoggle caption Richard Ellis/Getty Images