I suggest that Biden review what was included in the Text of Joint Resolution On Iraq Passed By The United States Congress
There are 23 reasons why we went to war against Iraq including:
Whereas members of al-Qaida, an organization bearing responsibility for attacks on the United States, its citizens, and interests, including the attacks that occurred on September 11, 2001, are known to be in Iraq;
Whereas Iraq continues to aid and harbor other international terrorist organizations, including organizations that threaten the lives and safety of American citizens;
Whereas it is in the national security of the United States to restore international peace and security to the Persian Gulf region.