The Committee on Armed Services exercises legislative oversight for the nation's military, including the Department of Defense, military research and development, nuclear energy activities, and benefits for members of the armed forces. It also handles the confirmation of presidential nominees for senior defense and military positions.

The Committee on Commerce, Science, and Transportation addresses a wide range of issues including interstate commerce, transportation systems, science and technology policy, space exploration, and consumer protection. It oversees agencies like the Department of Transportation, NASA, the FCC, and the FTC.

The Committee on Foreign Relations leads Senate consideration of U.S. foreign policy, including treaties, diplomatic nominations, foreign aid, and arms control. It shapes legislation concerning international relations and provides oversight of the State Department and other foreign affairs agencies.

The Committee on Veterans' Affairs handles legislation related to veterans' benefits, healthcare, housing, employment, and memorials. It provides oversight for the Department of Veterans Affairs (VA) and addresses issues affecting former service members.