I think it's Rummy's stuttering that did it for him. Rumsfeld could work on a little self confidence. However, I have confidence in him.
Let me clarify. I have confidence in Rumsfeld, not McCain. McCain could barely make himself endorse Bush this election.
Read American Soldier by Gen. Tommy Franks, it gives insight on the dynamics between Rumsfeld and military leaders, administration and anyone else coming into contact with him, interesting man. I don't think he lacks in confidence but he certainly operates at FULL SPEED AHEAD!
RB