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 Homeland Security provides oversight for the Department of Homeland Security and addresses issues related to counterterrorism, cybersecurity, border security, emergency preparedness, and critical infrastructure protection. It develops legislation to secure the nation from various threats.

The Oversight and Government Reform plays an important role in developing legislation and providing oversight in its area of jurisdiction. The committee holds hearings, conducts investigations, and reviews bills that shape federal policy.