Even if you have seen it, watch it again before the election.
I'm not even half way through yet, but I can tell you a couple things. The Bush campaign is right on a couple counts. They are right as they continue to repeatedly insist and pound into our heads that 9/11 was the most important event of Bush's presidency. They are right when they say that Bush's response to this showed what he is really made of. But they are not right for the reasons they think. They think this was his finest hour.
Watch the movie for another perspective.