As always, Instapundit has more. Obama has a tendency to get tired, and when he gets tired he starts making mistakes. That isn’t a good trait in a Presidential candidate. The Democrats have fallen in political love with Obama, but that means that they’re not rationally evaluating him as a candidate. If they did, one wonders if he’d be the front-runner right now.
Being the immense nerd that I am, this scene from Doctor Who sprung to mind:
Don’t you think Obama looks tired?