The Iraq Resolution & the Iraq War

This is from the section of the joint Resolution for the Authorization for the Use of Military Force against Iraq that authorizes the use of military force by the President:

SEC. 3. AUTHORIZATION FOR USE OF UNITED STATES ARMED FORCES.

(a) AUTHORIZATION. The President is authorized to use the Armed Forces of the United States as he determines to be necessary and appropriate in order to

(1) defend the national security of the United States against the continuing threat posed by Iraq; and
(2) enforce all relevant United Nations Security Council Resolutions regarding Iraq.

So here are some questions we have:

1. How does the present Iraq government pose a "continuing threat" to the security of the United States;

2. What relevant United Nations Security Council Resolution regarding Iraq is being enforced by the United States military in Iraq; and

3. Why don't Democrats talk more about this resolution in their speeches and remarks against the war in Iraq?

The resolution doesn't call for continuing war in Iraq, rather it calls for the accomplishments of certain goals. If those goals have been met, then under what authorization is the President keeping the military in Iraq?