In front of a teleprompter, he does decent enough. In unscripted situations, he becomes unclear and less confident. That's why his handlers always make sure that all his public appearances are highly controlled. Interestingly, I notice that in old tapes that Bush was far more articulate and dynamic when he first ran for Governor of Texas in 1994 and even when he ran for President in 2000. Of course, I'd imagine that the stress eventually gets to you. Having chronically low approval ratings also doesn't help your confidence all that much.
