Congress |
Dates |
Democratic whip |
Democratic leader |
Majority |
Republican leader |
Republican whip |
63rd |
May 28, 1913 – March 4, 1915 |
J. Hamilton Lewis |
None |
Democratic ← majority |
None |
None |
64th |
March 4, 1915 – December 6, 1915 |
December 6, 1915 – December 13, 1915 |
James Wadsworth |
December 13, 1915 – March 4, 1917 |
Charles Curtis |
65th |
March 4, 1917 – March 4, 1919 |
66th |
March 4, 1919 – April 27, 1920 |
Peter Gerry |
Republican majority → |
Henry Cabot Lodge Unofficial |
April 27, 1920 – March 4, 1921 |
Oscar Underwood |
67th |
March 4, 1921 – March 4, 1923 |
68th |
March 4, 1923 – December 3, 1923 |
December 3, 1923 – November 9, 1924 |
Joseph T. Robinson |
November 9, 1924 – March 4, 1925 |
Charles Curtis Acting |
Wesley Jones Acting |
69th |
March 4, 1925 – March 4, 1927 |
Charles Curtis |
Wesley Jones |
70th |
March 4, 1927 – March 4, 1929 |
71st |
March 4, 1929 – March 4, 1931 |
Morris Sheppard |
James E. Watson |
Simeon Fess |
72nd |
March 4, 1931 – March 4, 1933 |
73rd |
March 4, 1933 – January 3, 1935 |
J. Hamilton Lewis |
Democratic ← majority |
Charles L. McNary |
Felix Hebert |
74th |
January 3, 1935 – January 3, 1937 |
None[lower-alpha 1] |
75th |
January 3, 1937 – July 14, 1937 |
July 14, 1937 – January 3, 1939 |
Alben W. Barkley |
76th |
January 3, 1939 – April 9, 1939 |
April 9, 1939 – January 3, 1940 |
Sherman Minton |
January 3, 1940 – January 3, 1941 |
Warren Austin Acting |
77th |
January 3, 1941 – January 3, 1943 |
J. Lister Hill |
Charles L. McNary |
78th |
January 3, 1943 – February 25, 1944 |
Kenneth Wherry |
February 25, 1944 – January 3, 1945 |
Wallace H. White Acting |
79th |
January 3, 1945 – January 3, 1947 |
Wallace H. White |
80th |
January 3, 1947 – January 3, 1949 |
Scott W. Lucas |
Republican majority → |
81st |
January 3, 1949 – January 3, 1951 |
Francis Myers |
Scott W. Lucas |
Democratic ← majority |
Kenneth S. Wherry |
Leverett Saltonstall |
82nd |
January 3, 1951 – January 3, 1952 |
Lyndon B. Johnson |
Ernest McFarland |
January 3, 1952 – January 3, 1953 |
Styles Bridges |
83rd |
January 3, 1953 – July 31, 1953 |
Earle Clements |
Lyndon B. Johnson |
Republican majority → |
Robert A. Taft |
August 3, 1953 – January 3, 1955 |
William Knowland |
84th |
January 3, 1955 – January 3, 1957 |
Democratic ← majority |
85th |
January 3, 1957 – January 3, 1959 |
Mike Mansfield |
Everett Dirksen |
86th |
January 3, 1959 – January 3, 1961 |
Everett Dirksen |
Thomas Kuchel |
87th |
January 3, 1961 – January 3, 1963 |
Hubert Humphrey |
Mike Mansfield |
88th |
January 3, 1963 – January 3, 1965 |
89th |
January 3, 1965 – January 3, 1967 |
Russell B. Long |
90th |
January 3, 1967 – January 3, 1969 |
91st |
January 3, 1969 – September 7, 1969 |
Ted Kennedy |
Hugh Scott |
September 24, 1969 – January 3, 1971 |
Hugh Scott |
Robert Griffin |
92nd |
January 3, 1971 – January 3, 1973 |
Robert Byrd |
93rd |
January 3, 1973 – January 3, 1975 |
94th |
January 3, 1975 – January 3, 1977 |
95th |
January 3, 1977 – January 3, 1979 |
Alan Cranston |
Robert Byrd |
Howard Baker |
Ted Stevens |
96th |
January 3, 1979 – November 1, 1979 |
November 1, 1979 – March 5, 1980 |
Ted Stevens Acting |
March 5, 1980 – January 3, 1981 |
Howard Baker |
97th |
January 3, 1981 – January 3, 1983 |
Republican majority → |
98th |
January 3, 1983 – January 3, 1985 |
99th |
January 3, 1985 – January 3, 1987 |
Bob Dole |
Alan Simpson |
100th |
January 3, 1987 – January 3, 1989 |
Democratic ← majority |
101st |
January 3, 1989 – January 3, 1991 |
George Mitchell |
102nd |
January 3, 1991 – January 3, 1993 |
Wendell Ford |
103rd |
January 3, 1993 – January 3, 1995 |
104th |
January 3, 1995 – June 12, 1996 |
Tom Daschle |
Republican majority → |
Trent Lott |
June 12, 1996 – January 3, 1997 |
Trent Lott |
Don Nickles |
105th |
January 3, 1997 – January 3, 1999 |
106th |
January 3, 1999 – January 3, 2001 |
Harry Reid |
107th |
January 3, 2001 – January 20, 2001 |
Democratic ← majority |
January 20, 2001 – June 6, 2001 |
Republican majority → |
June 6, 2001 – November 23, 2002 |
Democratic ← majority |
November 23, 2002 – January 3, 2003 |
majority → |
108th |
January 3, 2003 – January 3, 2005 |
Bill Frist |
Mitch McConnell |
109th |
January 3, 2005 – January 3, 2007 |
Dick Durbin |
Harry Reid |
110th |
January 3, 2007 – December 18, 2007 |
Democratic ← majority |
Mitch McConnell |
Trent Lott |
December 19, 2007 – January 3, 2009 |
Jon Kyl |
111th |
January 3, 2009 – January 3, 2011 |
112th |
January 3, 2011 – January 3, 2013 |
113th |
January 3, 2013 – January 3, 2015 |
John Cornyn |
114th |
January 3, 2015 – January 3, 2017 |
Republican majority → |
115th |
January 3, 2017 – January 3, 2019 |
Chuck Schumer |
116th |
January 3, 2019 – January 3, 2021 |
John Thune |
117th |
January 3, 2021 – January 20, 2021 |
January 20, 2021 – January 3, 2023 |
Democratic ← majority |
118th |
January 3, 2023 – January 3, 2025 |
Congress |
Dates |
Democratic whip |
Democratic leader |
Majority |
Republican leader |
Republican whip |