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A member of Congress must be at least 25 years old, must have been a US citizen for at least seven years, and must live in the state he or she represents.
A senator must be at least 30 years old, must have been a US citizen for at least nine years, and must live in the state he or she represents.
535 (100 in the Senate and 435 in the House of Representatives).
$169,300 (as of 2008).
Less than one year. There are two sessions in each term.
Only the President of the United States.
Equally among all states; each state, no matter how large or small, receives two seats in the Senate.
On the basis of population; larger states get more seats than smaller states.
Every two years.
Every six years.
The power to tax, the power to regulate commerce and currency, the power to declare war, and the power to impeach the president.
Twice (Andrew Johnson in 1868 and Bill Clinton in 1998); both men were acquitted of impeachment charges by the Senate and remained in office. Richard Nixon also resigned from the presidency in 1974 to avoid being impeached.