The latest ad from Barack Obama counters a John McCain ad released earlier this week in which the Republican tried to put some distance between himself and George W. Bush. McCain's big problem here is not only that he spent a lot of time on TV during the primary trying to convince Republican voters that he is a true Republican, he spent a lot of time on TV going to bat for Bush over the last four years. Only four seconds into the ad, we're treated to John McCain -- on Fox News no less -- saying, "The president and I agree on most issues. There was a recent study that showed that I voted with the president over 90% of the time." There's been worry that Obama might be perceived as going "off" message if and when he attacks McCain. This execution should comfort those concerned about that. Since it uses McCain's own words, it doesn't come off as underhanded and "negative."