From a Heads in the Sand point of view, I’d be much happier if Joe Biden had opposed the 2002 Iraq AUMF. And even beyond that, I don’t always agree with his substantive positions on the issues. But one clear asset he has is that like only a handful of other prominent Democratic leaders (Wesley Clark one among them) Biden consistently approaches national security debates with an attitude of confidence that projects a desire to win the argument rather than wriggle away from it.