I think it was a purely political decision. The President I voted for wouldn't have thrown Rummy to the wolves. President Bush is pandering. And it's only going to get worse.
Sounds like you should change your screen name now if you think he is pandering and going to get worse. :o)
It's puzzling that you reject the notion that Rummy insisted on his resignation this time without knowing any more than we do. However, I'm not going to argue about circumstances we are not privy to.