Obama on the attack

Bloggers have been debating whether the Obama campaign needs to go negative, fueled by statements from former Hillary Clinton adviser, Mark Penn, indicating that the time to do so is now. I'm not sure how much credence to give to a man who had much to do with a campaign that went from inevitable to also-ran, but the Obama campaign is about to air the ad below in 16 battleground states. Apparently, they think it's time to turn some of McCain's perceived recent strengths on gas prices into liabilities and to reinforce that he advocated the invasion of Iraq and has been a loyal vote for Bush in recent years.