The U.S. Congress, the legislative branch of the federal government, consists of two houses: the Senate and the House of Representatives. Powers granted to Congress under the Constitution include the power to levy taxes, borrow money, regulate interstate commerce, impeach and convict the president, declare war, discipline its own membership, and determine its rules of procedure. With the exception of revenue bills, which must originate in the House of Representatives, legislative bills may be introduced in and amended by either house, and a bill—with its amendments—must pass both houses in identical form and be signed by the president before it becomes law. The president may veto a bill, but a veto can be overridden by a two-thirds vote of both houses. The House of Representatives may impeach a president or another public official by a majority vote; trials of impeached officials are conducted by the Senate, and a two-thirds majority is necessary to convict and remove the individual from office. Congress is assisted in its duties by the General Accounting Office (GAO), which examines all federal receipts and expenditures by auditing federal programs and assessing the fiscal impact of proposed legislation, and by the Congressional Budget Office (CBO), a legislative counterpart to the OMB, which assesses budget data, analyzes the fiscal impact of alternative policies, and makes economic forecasts.
The House of Representatives is chosen by the direct vote of the electorate in single-member districts in each state. The number of representatives allotted to each state is based on its population as determined by a decennial census; states sometimes gain or lose seats, depending on population shifts. The overall membership of the House has been 435 since the 1910s, though it was temporarily expanded to 437 after Hawaii and Alaska were admitted as states in 1959. Members must be at least 25 years old, residents of the states from which they are elected, and previously citizens of the United States for at least seven years.
It has become a practical imperative—though not a constitutional requirement—that a member be an inhabitant of the district that elects him.
Members serve two-year terms, and there is no limit on the number of terms they may serve. The speaker of the House, who is chosen by the majority party, presides over debate, appoints members of select and conference committees, and performs other important duties; he is second in the line of presidential succession (following the vice president). The parliamentary leaders of the two main parties are the majority floor leader and the minority floor leader. The floor leaders are assisted by party whips, who are responsible for maintaining contact between the leadership and the members of the House. Bills introduced by members in the House of Representatives are received by standing committees, which can amend, expedite, delay, or kill legislation. Each committee is chaired by a member of the majority party, who traditionally attained this position on the basis of seniority, though the importance of seniority has eroded somewhat since the 1970s. Among the most important committees are those on Appropriations, Ways and Means, and Rules.
The Rules Committee, for example, has significant power to determine which bills will be brought to the floor of the House for consideration and whether amendments will be allowed on a bill when it is debated by the entire House.
Each state elects two senators at large. Senators must be at least 30 years old, residents of the state from which they are elected, and previously citizens of the United States for at least nine years. They serve six-year terms, which are arranged so that one-third of the Senate is elected every two years. Senators also are not subject to term limits. The vice president serves as president of the Senate, casting a vote only in the case of a tie, and in his absence the Senate is chaired by a president pro tempore, who is elected by the Senate and is third in the line of succession to the presidency. Among the Senate’s most prominent standing committees are those on Foreign Relations, Finance, Appropriations, and Governmental Affairs. Debate is almost unlimited and may be used to delay a vote on a bill indefinitely. Such a delay, known as a filibuster, can be ended by three-fifths of the Senate through a procedure called cloture. Treaties negotiated by the president with other governments must be ratified by a two-thirds vote of the Senate. The Senate also has the power to confirm or reject presidentially appointed federal judges, ambassadors, and cabinet officials. "USA" © Emmanuel BUCHOT, Encarta, Wikipedia
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