The roll call votes in the House and Senate were not close. On October 10, 2002, the House approved the resolution 296 to 133. The Senate followed, 77 to 23. The Authorization for Use of Military Force Against Iraq (AUMF) handed President George W. Bush the legal instrument to launch an invasion the following March. The debate lasted three days. The text cited the attacks of September 11, 2001, Iraq's alleged possession of weapons of mass destruction, and Saddam Hussein's purported ties to al-Qaeda. The air in the chamber was thick with the rhetoric of imminent threat.
What was said on the floor diverged sharply from the private calculus. Many lawmakers expressed deep skepticism about the intelligence in closed-door briefings. They voted yes anyway, influenced by looming midterm elections, political pressure from the White House, and a desire not to appear weak on national security. The AUMF was not a declaration of war but a sweeping delegation of congressional power. It authorized force to "defend the national security of the United States against the continuing threat posed by Iraq" and to enforce UN Security Council resolutions. This language proved elastic enough to cover years of occupation and counter-insurgency.
The resolution's legacy is a case study in legislative abdication. Congress ceded its constitutional war-making authority based on flawed premises that later unraveled. No stockpiles of chemical or biological weapons were found. The connection to 9/11 was fictitious. The vote cast a long shadow, creating a precedent for expansive executive war powers and a protracted conflict that resulted in over 4,600 U.S. military deaths and an estimated 200,000 Iraqi civilian deaths. Subsequent attempts to repeal or replace the 2002 AUMF have stalled, leaving it, alongside the 2001 AUMF, as a dormant but potent tool for future presidents.