Check out our comprehensive ThinkProgress roundup on the debate, lots of fact-checks and so forth.
All things considered, it’s about a draw. McCain got a couple of good punches in and so did Obama. Insofar as the idea is supposed to be that McCain has a domineering advantage on national security he certainly didn’t prove that point. And for the candidate who’s losing, a tie amounts to a loss. He needs to find opportunities to gain ground on Obama and he doesn’t seem to me to have gotten much done.