The House of Representatives is composed of 435 members representing Congressional districts in every state, as well as 6 non-voting members representing the U.S. Territories (American Samoa, Guam, Northern Mariana Islands, Puerto Rico, U.S. Virgin Islands) and Washington DC. Representatives are normally elected to 2-year terms, with all members up for re-election every two years. The presiding officer of the House of Representatives is the Speaker of the House. The Speaker administers the oath of office to House members, chairs and nominates chairmanships to House Committees, and appoints Committee members. The current Speaker of the House is Nancy Pelosi.
The Vice President of the United States serves as the president of the Senate and has the power of casting the tie-breaking vote on Senate decisions.