美國參議員的職務

impeachment- sole power to conduct impeachment trials, essentially serving as jury and judge

nomination- nominate president, appoint Ambassadors, other public Ministers and Consuls, Judges of the Supreme Court, and all other Officers of the U.S.

treaties- power to approve, by a two-thirds vote, treaties made by the executive branch

expulsion and censure- punish its members for disorderly behavior, and, with the concurrence of two-thirds, expel a member

filibuster and cloture- to delay debate or block legislation