A radio ad is making the rounds in Cleveland, Reno, and Philadelphia, slamming the local Republican senator and the apparent leader of the opposition: Rush Limbaugh. The ad, from the labor-backed Americans United for Change, slams House Republicans who “voted with Limbaugh against creating 4 million new American jobs.” It finishes by asking whether the local senator will "side with Rush Limbaugh, too?” (More Rush Limbaugh stories.)