The Republican National Committee has created a new Web Ad, "Guilt by Participation," that pushes the William Ayers attack line further than any previous ads. It includes footage of Ayers praising "the spirit of insurgency," and introduces the tag line "Barack Obama. Career First, country second." The RNC announced plans to send the ad to nearly ten million voters on Monday. FactCheck.org has released this analysis of a previous William Ayers ad, which rebuts most of the claims that the McCain campaign has been making.

RNC Web ad "Guilt by Participation:"