Capital Building at dusk, Washington D.C.

Congressional authority in national security is provided by Article I of the U.S. Constitution. Congress is responsible for the provision of funding for U.S. national security, regulation of commerce with foreign nations, declaration of war, provision of legislative authorities and restrictions with regard to U.S. involvement internationally, ratification of treaties, confirmation of Presidential appointees, and oversight of executive branch policy implementation. Congressional members and committees exercise these powers to influence national security policymaking and implementation. The Congressional Budget Office, the General Accountability Office, the Congressional Research Service, and committee staff produce analysis that allows Congress to influence national security issues, whether through legislation or oversight.

Key Congressional committees in oversee national security issues are: