(Newser) – Mitt Romney is out with a new ad this morning that's generating some buzz, reports CNN. Repeating Bob Woodward's account of tensions between President Obama and top Democrats during negotiations over raising the debt limit, the ad alleges that during a phone conference, "As President Obama spoke, Nancy Pelosi hit the mute button, went on with their meeting, ignoring the president, not even listening to what he had to say." It concludes: "If he cannot lead his own party, how can he lead America?" Pelosi tells Politico bluntly, "That didn't happen."