This probably isn't the rarest insight ever made, but I keep hearing Bush et al pounce on Kerry's saying we should be able to "pass the global test" before invading a country, and it's made me think of a perfect rebuttal to Dick Cheney.
Edwards should say: "Vice President Cheney served in the first President Bush's administration, and he served with honor. When he was facing military action in Iraq, he passed the global test and build a tremendous coaliton, 670,000 troops from many nations, and then took action. And it was such as success that people like John Kerry, who were skeptical at first, changed the way we approach international alliances. I don't know why Mr. Cheney, as vice president, is disparaging those kinds of alliances. That is the kind of global alliance, America sharing the costs with the world, that John Kerry and I will build."
Maybe it's not perfectly worded. I tried to include an innoculation mentioning Kerry's initial skepticism of the 1991 war, because he voted against it. I think it would work if Edwards implies that Kerry has learned from our foreign policy while Cheney has become reckless and incompetent.