This from Peter Bienart (courtesy Atrios) tracks my thoughts on the opportunity that McChrystal situation presents pretty well. Replacing McChrystal is a chance to change course and get the hell out of Afghanistan.
update: Sir Charles is, as always, far more eloquent than I...
First on the opportunity to get us the hell out,
So Obama should look for the general who is least enthusiastic about the mission, someone with no faith in counterinsurgency strategy (and there are many of them in the Army), who desperately wants to get the troops out as fast as possible. That's your guy.
And on the need to fire,
I only disagree about the insubordination not being a sufficient point to fire this asshole. Sometimes, in fact, showing everyone who has the biggest metaphorical dick is actually important, and when the issue is over who has control of the military, it's, pardon the pun, no small thing.