Iraq's noncompliance with the conditions of the 1991 cease fire, including interference with weapons inspectors.
Iraq's alleged weapons of mass destruction, and programs to develop such weapons, posed a "threat to the national security of the United States and international peace and security in the Persian Gulf region."
Iraq's "brutal repression of its civilian population."
Iraq's "capability and willingness to use weapons of mass destruction against other nations and its own people".
Iraq's hostility towards the United States as demonstrated by the alleged 1993 assassination attempt of former President George H. W. Bush, and firing on coalition aircraft enforcing the no-fly zones following the 1991 Gulf War.
Members of al-Qaeda, 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.
Iraq's "continu[ing] to aid and harbor other international terrorist organizations," including anti-United States terrorist organizations.
The efforts by the Congress and the President to fight terrorists, including the September 11th, 2001 terrorists and those who aided or harbored them.
The authorization by the Constitution and the Congress for the President to fight anti-United States terrorism.
Citing the Iraq Liberation Act of 1998, the resolution reiterated that it should be the policy of the United States to remove the Saddam Hussein regime and promote a democratic replacement.