Yeah, well... the current Congress probably wouldn't approve him, and the incoming Congress definitely wouldn't, so Bush can't show his contempt for the will of the people's elected officials again, not this time. I suppose he could afford to pay Bolton's salary out of pocket, but even Bush doesn't have that kind of chutzpah. Probably.
Bush hasn't had to work with Congress, since it's been willing to do his bidding these six years, for the most part. He could usually get what he wanted, usually under duress. Bush's problem is that political skills only extend to working with pliant and compliant legislative bodies. The Democrats in the Texas legislature were easy for Bush to work with; they weren't far off from the Republicans there, ideologically. When Bush was faced with a narrowly Democratic Senate for a year and a half, his only tactic was to run roughshod over them; you never saw him resorting to compromise, as narrow as the numeric advantage was.
The new Congress will give us a better idea as to what kind of a politician Bush is. Even with a friendly Congress, he had to beat and thrash them to get his will accomplished. Now that both houses of Congress are hostile, Bush is going to have to work extra hard, and I don't think he's up for the job. He'll probably drag out some other right-wing jackass to embarrass us at the UN, but sooner or later he's going to realize that such obstructionism will only hurt him. A little obstruction is fine; that's called principle. But too much obstruction is self-defeating. Those who like Bush might say he's got too much principle, to paint him in the best possible light. Me, I'd say this style of governing is better described as "going down with the ship." Anchors aweigh!