Good Question.

From Joe Klein,

...one wonders what the McCain campaign would be doing to Obama today if Obama, instead of McCain, had made the major foreign policy factual errors of the debate--calling Pakistan a failed state when Musharraf took over and screwing up the name of Pakistan's new leader. (And, once again, McCain continued to insist that the flagrant Mahmoud Ahmadinejad was the leader of Iran, even though there's another guy, Ali Khamenei, was actually has the title Supreme Leader and controls Iran's foreign policy and nuclear program. But then, as ever, McCain seems unwilling to change his locutions in this campaign, even when they are proven false.)