Matt Stoller has a useful reminder to people (like me) touting the power of McCain's war-hero biography: "1992, 1996, 2000, and 2004 all saw the candidate without military
service elected over the candidate who had served, in several cases
heroically."
Update: Ed Kilgore has more thoughts on this:
McCain may be in the process of making the same big mistake his
friend Kerry made in 2004--making his biography the overriding
centerpiece of his national security message. Sure, McCain's war record
attests to his character and patriotism, but hardly means he'd be an
effective commander-in-chief. If that were the case, we'd only have
military leaders as presidents. What McCain has to say about national
security issues will, over time, have as great an impact on how he's
perceived by persuadable voters as endless clips of him in uniform or
returning from the Hanoi Hilton. The tragedy of the Kerry campaiign was
that the man did have a pretty powerful grasp of national security
challenges and what to do about them, but it never much got a hearing
thanks to the back-and-forth about his own "story."
--Michael Crowley