Back in the spring and summer, a lot of Hillary Clinton supporters liked to make the charge that Obama was a candidate totally lacking in detail or substance. But interestingly, they rarely could back up the charge with specifics of their own (details where they could say that Obama's positions were less substantive than Clinton's or McCain's). But now we are getting a great chance to see what a campaign based on a lack of substance actually looks like. And it's not the Obama campaign, it's the McCain campaign.
McCain's campaign has nothing left in the bag except attacks on Obama's character (or more accurately, the character of his neighbors). On substantive issues like the economy, McCain's campaign seems to cycle through positions like a slot machine, repeatedly pulling the arm until one pops up that pays off. He doesn't even talk about his own biography that much anymore.
My motive here is only partly to tweek the noses of the Clinton supporters who were so critical earlier this year. Really I want to point out that when a campaign really lacks substance it gets to be pretty obvious. It's not something reasonable people would seriously disagree about. It gets obvious to voters and they start to say things like "all McCain does is run negative attacks" and they turn away. That's exactly what we've seen in the last few weeks. McCain's lack of substance and credible detail seems to have fatally damaged his campaign.