John Warner rejoined Hogan & Hartson after his decision not to seek a sixth term as U.S. Senator for the Commonwealth of Virginia. During his 30 years in the Senate, he served on the Senate Armed Services Committee, including three periods as Chairman, and was viewed as one of the most influential senators on military and foreign policy issues. At varying times, The Senator also served on the Senate Health, Education, and Pensions Committee; Committee on Homeland Security and Governmental Affairs; Select Committee on Intelligence (where he served as Vice Chairman for several years); Commerce Committee; Environment and Public Works Committee; and Rules Committee (where he served as Chair for several years). Most recently, he was the lead co-sponsor with Senator Joseph Lieberman (I-Conn.) on climate change legislation.