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Bruce Smith, Associated Press
Bailey Shifflett, a waitress from Charleston, S.C., holds a sign asking for votes for comedian Stephen Colbert as fans line up to attend Colbert's "Rock Me Like a Herman Cain South Cain-olina Primary Rally" at the College of Charleston in Charleston, S.C., on Friday, Jan. 20, 2012. Colbert is appearing Friday with former presidential candidate Herman Cain at the College of Charleston. Colbert says a vote for Cain would be a strong message that people want Colbert on the ballot.

CHARLESTON, S.C. — Comedian Stephen Colbert, who says he's running for president of "The United States of South Carolina," is urging voters there to cast their ballots in Saturday's presidential primary for former GOP hopeful Herman Cain.

Colbert, who is not on the ballot, says he has believed Cain's message for "several days now."

He appeared with Cain at a rally Friday at the College of Charleston and told the more than 3,000 people that a vote for the former candidate would send a strong message that the people want Colbert.

Cain demurred and told the crowd to vote for whomever they want.

Colbert called it the "Rock Me Like a Herman Cain South Cain-olina Primary Rally."