This all reminds me of some of the things Nixon did in advance of pulling US forces out of Vietnam. Nixon waged an undeclared war by invading Cambodia, the result of which was the elimination of the Southern end of the Ho Chi Minh Trail as an effective staging area. This bought the US time to pull forces out (and build up South Vietnam's forces) as part of his "Vietnamization" plan.
The question now is whether the Dems will do to Bush what they did to Ford in 1975: completely tie his hands and prevent him from doing what is necessary to support the Iraqi government once US forces are withdrawn ...
Of course the president could veto any such resolution, only to be over-ridden by a two thirds majority.
A difference is that Ford was looking for re-election in 1976. Therefore, he did not confront Congress. If Nixon had no blundered into Watergate, the history of Vietnam would have been quite different.