Example image of eyePlorer eyePlorer map for 'United States Senate': Bicameralism Lower house United States Congress United States House of Representatives Upper house Article One of the United States Constitution United States Constitution U.S. state United States Capitol Washington, D.C. Impeachment in the United States Ratification Treaty Uniformed services of the United States United States armed forces United States federal executive departments United States federal judge Roman Senate Latin Territories of the United States Connecticut Compromise Electoral College (United States) 1790 United States Census List of U.S. states and territories by population Seventeenth Amendment to the United States Constitution State legislature (United States) Federalist No. 62 James Madison Armistead Thomson Mason Henry Clay John Eaton Rush D. Holt, Sr. Fourteenth Amendment to the United States Constitution Confederate States of America Universal suffrage 1st United States Congress Classes of United States Senators Election Day (United States) Primary election Ballot access Plurality (voting) Two-round system Governor (United States) Oklahoma Oregon Wisconsin Massachusetts Alaska Salaries of United States Senators Vesting