I know you're not the only one who thinks so, but I think all of you are mistaking thoughtful pauses as somehow 'stumbling.'
Other than the one moment when he really had no answer, I didn't see him stumble at all.
I do have it on tape, however, and will likely watch it again to see if my perception changes........but I doubt it will.
If GWB appeared tired during the press conference, it could be due to the hour. Doesn't he usually go to bed at around the time he started? It would be like regular folk having to deliver an important speech and Q&A at midnight.
I'm going to see if I can pick up a rebroadcast of it. I got a phone call just before it ended so missed the very end of it.
LQ