"My guess is that the Bush administration planners will not call for a draft. "The military command, and the civilian leadership, learned an important lesson in Vietnam: you can't expect a citizen's army to fight a vicious, brutal colonial war. Their predecessors knew that. The British, French, etc., provided the officer corps, special forces, and professional military, but relied on the Foreign Legion, Ghurkas, Indian troops, and other mercenaries. That's standard. The US made a serious tactical error in this regard in Vietnam -- though it had plenty of mercenaries too: South Korean, Thai, and others. In Iraq, the US is using what amounts to a mercenary army of the disadvantaged, and the second largest military force is the "private" companies made up of ex-military officers, South African killers, etc.
"In Vietnam, the army collapsed from within: drugs, killing officers, etc. Citizens are not trained killers, and they are not sufficiently dissociated from the civilian culture at home to fight colonial wars properly. The top brass wanted the army out, before it fell apart. And the civilian leadership agreed.
"A guess, of course, but that's what I'd expect.
"I might add, for what it's worth, that although I was actively involved in organizing and supporting resistance (including support for draft resisters) in the 60s, and was saved from a likely prison sentence only by the Tet offensive, I was never opposed to the draft. If there is to be an army, it would be best, I think, for it to be mainly a citizen's army. In part for the reasons that the top command oppose that option.
"As to how long it will be tolerated, that's up to us."
http://blog.zmag.org/ee_links/the_draft
In stronger language elsewhere, Chomsky has said that he affirmatively disagreed with the anti-war movement during the Vietnam era when it began making demands for repeal of the draft. I don't remember in what article or book I read that and can't find it online now. So not only did not he not oppose the draft, he also supported its continued existence at that time.