Congress is wasting much time debating timetables, funding, etc. for the conflict in Iraq. Many Democrats would like to see a pull-out as soon as possible. This will not happen, certainly not before January, 2009, when someone else — hopefully, someone with some sense, but I'm not holding my breath — replaces George W. Bush as President of the United States. Bush can veto any bill that Congress passes, and on this particular topic the Democrats won't be able to put together a veto-proof majority in either house.
What Congress should be doing is passing something like the following:
The President of the United States shall not, without explicit concurrence of both Houses of Congress, initiate overt military action against any nation which has not previously and demonstrably initiated overt military action against the United States or its forces abroad.
This would probably be known as the "Iran" resolution, since it would be aimed at short-circuiting the Administration's obvious and ill-conceived desire to attempt régime change in Iran through a bombing campaign. It, too, might have difficulty in collecting a veto-proof majority, but the difficulty would, I think, be less (there are at least some sensible Republicans who know what a third concurrent war on the ground would mean to our military), and at least Congress would be on record.