Pennsylvania Democrat Joe Sestak's campaign unearthed footage of Republican Senate candidate Pat Toomey saying, "let's not tax corporations." The Sestak camp incorporated the footage into its new TV ad, which calls Toomey "Wall Street’s congressman."

Toomey’s suggestion about eliminating corporate taxes would have been popular with Club for Growth supporters, the anti-tax group he once led. But it gives Democrats more ammunition in their effort to tie him to Wall Street. Earlier this month, Democrats were circulating footage of Toomey talking about derivatives, financial contracts used by traders. This attack, however, seems more easily digestible.

The Sestak camp said the ad is up on cable and broadcast throughout the state, but it is not airing in Philadelphia.

--Updated at 1:03 p.m.