The common knowledge now is that Bush keeps Gonzales on board because it's his "stay out of jail" card for his staff and perhaps even for himself. Every time Gonzales appears before the committee it's a train wreck of even more epic scale than the train wreck before. Josh Marshall at Talking Points Memo has compiled an excellent video summary of the proceedings. Be sure to check it out.
By the way, some of you may recall that I predicted in December of 2000 that there is no outrage too bold for this gang.