In what may be one of the most pointed political jokes since Jonathan Swift's Modest Proposal, Stephen Colbert's satirical mystery tour has arrived in South Carolina.

As of Wednesday, the political action committee that the comedian founded amid much fanfare last year had spent $65,000 buying time in Charleston, S.C. to air a series of ads: one attacking Republicans who benefit from super PAC spending in general; another attacking Mitt Romney in particular, and a third suggesting that a vote for the now-non-candidate Herman Cain is a vote for faux-candidate Colbert. 

Earlier TV ad campaigns by ...