The constitutional debate rages, with huge ramifications. I submit that although Congress has power of the purse and the ability to declare war, the President has the authority to command troops, not Congress.

Then there's this:

Congress used its war powers to cut off or put conditions on funding for the Vietnam war and conflicts in Cambodia, Somalia and Bosnia.

Yeah, and that worked out so well. If congress didn't cut the funding for Vietnam, it's possible South Vietnam could have survived the assault from North Vietnam, and the result was different. We lost Vietnam because of a lack of political will and social will to send troops into harms way. Will we do the same for Iraq?