There are a lot more threats out there than AQ. We need both the President and Congress to exercise their constitutional responsibilities for national security to address the full range of threats. You do not write a blank check to the President and the President should not be turning one authorization into a blank check. The adversarial relationship between the President and Congress, while frustrating for national security "purists" is a necessary function built into our federal democratic republic that is the one of the first lines of defense of our Constitution.
AQ is a threat and still a dangerous one but we should not be myopically focused on it or look to tying everything to AQ. I really think that hinders our strategic thinking.