Rep. Michele Bachmann (R-Minn.) has taped an advertisement apologizing for her televised comments calling Barack Obama anti-American, according to a Republican source familiar with her campaign's decision.

Bachmann campaign spokeswoman Michelle Marston said the campaign will be airing a new advertisement this afternoon, but declined to comment specifically on whether Bachmann would be apologizing in the spot.

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The move comes as polling, both public and internal, shows Bachmann rapidly losing ground in her reelection bid....