My Pledge
Pledges regarding the Presidency seem to be a fad right now, so I'm going to make one of my own:
I pledge to treat President Bush precisely as I would treat any other President. I will support him on the issues I agree with him on (and there are some). I will criticize him, respectfully, on the issues I disagree with him on.
I think that's about as much as any reasonable person can ask of any other reasonable person*.
*Yes, I consider myself a reasonable person. Your mileage may vary. Or not.