United States Senate
For current members of the Senate, see Current members of the United States Senate. United States Senate 115th United States Congress Seal of the U.S. Senate Flag of the U.S. Senate Type Type Upper house of the United States Congress Term limits None History New session started January 3, 2017 ( 2017-01-03 ) Leadership President of the Senate Mike Pence (R) Since January 20, 2017 President pro tempore Orrin Hatch (R) Since January 6, 2015 Majority Leader Mitch McConnell (R) Since January 3, 2015 Minority Leader Chuck Schumer (D) Since January 3, 2017 Majority Whip John Cornyn (R) Since January 3, 2015 Minority Whip Dick Durbin (D) Since January 3, 2015 Structure Seats 100 Political groups Majority (51) Republican (51) Minority (49) Democratic (47) Independents (2) [Note 1] Length of term 6 years Elections Voting system First-past-the-post in 45 states; nonpartisan blanket primary with a majoritarian second round in 3 states; Two-round system in 1 state; Ranked-cho...