Please don't repeat the leftist lie that he was 'thrown under the bus.'
The terms of any high-level termination are always dressed up for gracious public consumption. Whether Rumsfeld was "asked to resign" or not is really academic and pedantic. The point is, the Commies scored a belt-notch. This cannot continue, and, frankly, I don't suspect it will.
Those dillweed Repubs in the Senate have a lot to answer for over the next two years, having effectively stalled most of the legislative agenda Dubya had coming forth, such as SS private accounts and the soon-to-expire tax cuts. He has no friends on the Hill, no political campaign to run, and his enemies are all in plain sight. He'll have a wondrous "lame duck" session, replete with his vision.