
At least that's what this Un-Cabaret blog post seems to imply:
Once Al Gore stopped pretending to be a 'serious' politician and started making fun of himself, he suddenly became a lot more likeable and trustworthy - even when he was delivering an inconvenient truth.
Scoff all you want, Al Gore's daughter wrote for Futurama. This may explain Obama's appeal too, making self-deprecating jokes about being from Krypton.
Wasn't Bush self-deprecating? Yeah - WAY after the fact. When he made his flubs, he never addressed them immediately. He just said them with such a serious face one couldn't help but laugh at him.
So politicians; be more Jon Stewart, less Stephen Colbert.