Does Bush have a disorder?

I caught this video from Radley Balko. Radley eloquently puts it,

Is it me, or after seven years of daily speeches, is President Bush actually getting worse at public speaking? He’s fine when he’s reading off a teleprompter. But when he speaks extemporaneously, he’s more cringe-inducing than ever. My point here isn’t to mock the guy. We’re way past that stage. I think we’re actually to the point where you can’t help but wonder if he has some sort of disorder. Watch this video.