<P> The Constitution designates the Vice President of the United States as President of the United States Senate . The Constitution also calls for a President pro tempore to serve as the leader of the body when the President of the Senate (the Vice President) is absent . In practice, neither the Vice President nor the President pro tempore--customarily the most senior (longest - serving) Senator in the majority party--actually presides over the Senate on a daily basis; that task is given to junior Senators of the majority party . Since the Vice President may be of a different party than the majority and is not a member subject to discipline, the rules of procedure of the Senate give the presiding officer very little power and none beyond the presiding role . For these reasons, it is the Majority Leader who, in practice, manages the Senate . This is in contrast to the House of Representatives where the elected Speaker of the House has a great deal of discretionary power and generally presides over votes on bills . </P> <P> The Democratic Party first selected a leader in 1920 . The Republican Party first formally designated a leader in 1925 . </P> <Table> <Tr> <Th> Cong - ress </Th> <Th> Dates </Th> <Th> Democratic Whip </Th> <Th> Democratic Leader </Th> <Th> Majority </Th> <Th> Republican Leader </Th> <Th> Republican Whip </Th> </Tr> <Tr> <Td> 63rd </Td> <Td> May 28, 1913--March 4, 1915 </Td> <Td> J. Hamilton Lewis </Td> <Td> None </Td> <Td> Democratic ← Majority </Td> <Td> None </Td> <Td> None </Td> </Tr> <Tr> <Td> 64th </Td> <Td> March 4, 1915--December 6, 1915 </Td> </Tr> <Tr> <Td> December 6, 1915--December 13, 1915 </Td> <Td> James Wadsworth </Td> </Tr> <Tr> <Td> December 13, 1915--March 4, 1917 </Td> <Td> Charles Curtis </Td> </Tr> <Tr> <Td> 65th </Td> <Td> March 4, 1917--March 4, 1919 </Td> </Tr> <Tr> <Td> 66th </Td> <Td> March 4, 1919--April 27, 1920 </Td> <Td> Peter Gerry </Td> <Td> Republican Majority → </Td> <Td> Henry Cabot Lodge Unofficial </Td> </Tr> <Tr> <Td> April 27, 1920--March 4, 1921 </Td> <Td> Oscar Underwood </Td> </Tr> <Tr> <Td> 67th </Td> <Td> March 4, 1921--March 4, 1923 </Td> </Tr> <Tr> <Td> 68th </Td> <Td> March 4, 1923--December 3, 1923 </Td> </Tr> <Tr> <Td> December 3, 1923--November 9, 1924 </Td> <Td> Joseph Taylor Robinson </Td> </Tr> <Tr> <Td> November 9, 1924--March 4, 1925 </Td> <Td> Charles Curtis Acting </Td> <Td> Wesley Jones Acting </Td> </Tr> <Tr> <Td> 69th </Td> <Td> March 4, 1925--March 4, 1927 </Td> <Td> Charles Curtis </Td> <Td> Wesley Jones </Td> </Tr> <Tr> <Td> 70th </Td> <Td> March 4, 1927--March 4, 1929 </Td> </Tr> <Tr> <Td> 71st </Td> <Td> March 4, 1929--March 4, 1931 </Td> <Td> Morris Sheppard </Td> <Td> James E. Watson </Td> <Td> Simeon Fess </Td> </Tr> <Tr> <Td> 72nd </Td> <Td> March 4, 1931--March 4, 1933 </Td> </Tr> <Tr> <Td> 73rd </Td> <Td> March 4, 1933--January 3, 1935 </Td> <Td> J. Hamilton Lewis </Td> <Td> Democratic ← Majority </Td> <Td> Charles L. McNary </Td> <Td> Felix Hebert </Td> </Tr> <Tr> <Td> 74th </Td> <Td> January 3, 1935--January 3, 1937 </Td> <Td> None </Td> </Tr> <Tr> <Td> 75th </Td> <Td> January 3, 1937--July 14, 1937 </Td> </Tr> <Tr> <Td> July 22, 1937--January 3, 1939 </Td> <Td> Alben W. Barkley </Td> </Tr> <Tr> <Td> 76th </Td> <Td> January 3, 1939--April 9, 1939 </Td> </Tr> <Tr> <Td> April 9, 1939--January 3, 1940 </Td> <Td> Sherman Minton </Td> </Tr> <Tr> <Td> January 3, 1940--January 3, 1941 </Td> <Td> Warren Austin Acting </Td> </Tr> <Tr> <Td> 77th </Td> <Td> January 3, 1941--January 3, 1943 </Td> <Td> J. Lister Hill </Td> <Td> Charles L. McNary </Td> </Tr> <Tr> <Td> 78th </Td> <Td> January 3, 1943--February 25, 1944 </Td> <Td> Kenneth Wherry </Td> </Tr> <Tr> <Td> February 25, 1944--January 3, 1945 </Td> <Td> Wallace H. White Jr . Acting </Td> </Tr> <Tr> <Td> 79th </Td> <Td> January 3, 1945--January 3, 1947 </Td> <Td> Wallace H. White Jr . </Td> </Tr> <Tr> <Td> 80th </Td> <Td> January 3, 1947--January 3, 1949 </Td> <Td> Scott W. Lucas </Td> <Td> Republican Majority → </Td> </Tr> <Tr> <Td> 81st </Td> <Td> January 3, 1949--January 3, 1951 </Td> <Td> Francis Myers </Td> <Td> Scott W. Lucas </Td> <Td> Democratic ← Majority </Td> <Td> Kenneth S. Wherry </Td> <Td> Leverett Saltonstall </Td> </Tr> <Tr> <Td> 82nd </Td> <Td> January 3, 1951--January 3, 1952 </Td> <Td> Lyndon B. Johnson </Td> <Td> Ernest McFarland </Td> </Tr> <Tr> <Td> January 3, 1952--January 3, 1953 </Td> <Td> Styles Bridges </Td> </Tr> <Tr> <Td> 83rd </Td> <Td> January 3, 1953--July 31, 1953 </Td> <Td> Earle Clements </Td> <Td> Lyndon B. Johnson </Td> <Td> Republican Majority → </Td> <Td> Robert A. Taft </Td> </Tr> <Tr> <Td> August 3, 1953--January 3, 1955 </Td> <Td> William F. Knowland </Td> </Tr> <Tr> <Td> 84th </Td> <Td> January 3, 1955--January 3, 1957 </Td> <Td> Democratic ← Majority </Td> </Tr> <Tr> <Td> 85th </Td> <Td> January 3, 1957--January 3, 1959 </Td> <Td> Mike Mansfield </Td> <Td> Everett Dirksen </Td> </Tr> <Tr> <Td> 86th </Td> <Td> January 3, 1959--January 3, 1961 </Td> <Td> Everett Dirksen </Td> <Td> Thomas Kuchel </Td> </Tr> <Tr> <Td> 87th </Td> <Td> January 3, 1961--January 3, 1963 </Td> <Td> Hubert Humphrey </Td> <Td> Mike Mansfield </Td> </Tr> <Tr> <Td> 88th </Td> <Td> January 3, 1963--January 3, 1965 </Td> </Tr> <Tr> <Td> 89th </Td> <Td> January 3, 1965--January 3, 1967 </Td> <Td> Russell B. Long </Td> </Tr> <Tr> <Td> 90th </Td> <Td> January 3, 1967--January 3, 1969 </Td> </Tr> <Tr> <Td> 91st </Td> <Td> January 3, 1969--September 7, 1969 </Td> <Td> Ted Kennedy </Td> <Td> Hugh Scott </Td> </Tr> <Tr> <Td> September 24, 1969--January 3, 1971 </Td> <Td> Hugh Scott </Td> <Td> Robert Griffin </Td> </Tr> <Tr> <Td> 92nd </Td> <Td> January 3, 1971--January 3, 1973 </Td> <Td> Robert Byrd </Td> </Tr> <Tr> <Td> 93rd </Td> <Td> January 3, 1973--January 3, 1975 </Td> </Tr> <Tr> <Td> 94th </Td> <Td> January 3, 1975--January 3, 1977 </Td> </Tr> <Tr> <Td> 95th </Td> <Td> January 3, 1977--January 3, 1979 </Td> <Td> Alan Cranston </Td> <Td> Robert Byrd </Td> <Td> Howard Baker </Td> <Td> Ted Stevens </Td> </Tr> <Tr> <Td> 96th </Td> <Td> January 3, 1979--November 1, 1979 </Td> </Tr> <Tr> <Td> November 1, 1979--March 5, 1980 </Td> <Td> Ted Stevens Acting </Td> </Tr> <Tr> <Td> March 5, 1980--January 3, 1981 </Td> <Td> Howard Baker </Td> </Tr> <Tr> <Td> 97th </Td> <Td> January 3, 1981--January 3, 1983 </Td> <Td> Republican Majority → </Td> </Tr> <Tr> <Td> 98th </Td> <Td> January 3, 1983--January 3, 1985 </Td> </Tr> <Tr> <Td> 99th </Td> <Td> January 3, 1985--January 3, 1987 </Td> <Td> Bob Dole </Td> <Td> Alan Simpson </Td> </Tr> <Tr> <Td> 100th </Td> <Td> January 3, 1987--January 3, 1989 </Td> <Td> Democratic ← Majority </Td> </Tr> <Tr> <Td> 101st </Td> <Td> January 3, 1989--January 3, 1991 </Td> <Td> George Mitchell </Td> </Tr> <Tr> <Td> 102nd </Td> <Td> January 3, 1991--January 3, 1993 </Td> <Td> Wendell H. Ford </Td> </Tr> <Tr> <Td> 103rd </Td> <Td> January 3, 1993--January 3, 1995 </Td> </Tr> <Tr> <Td> 104th </Td> <Td> January 3, 1995--June 12, 1996 </Td> <Td> Tom Daschle </Td> <Td> Republican Majority → </Td> <Td> Trent Lott </Td> </Tr> <Tr> <Td> June 12, 1996--January 3, 1997 </Td> <Td> Trent Lott </Td> <Td> Don Nickles </Td> </Tr> <Tr> <Td> 105th </Td> <Td> January 3, 1997--January 3, 1999 </Td> </Tr> <Tr> <Td> 106th </Td> <Td> January 3, 1999--January 3, 2001 </Td> <Td> Harry Reid </Td> </Tr> <Tr> <Td> 107th </Td> <Td> January 3, 2001--January 20, 2001 </Td> <Td> Democratic ← Majority </Td> </Tr> <Tr> <Td> January 20, 2001--June 6, 2001 </Td> <Td> Republican Majority → </Td> </Tr> <Tr> <Td> June 6, 2001--January 3, 2003 </Td> <Td> Democratic ← Majority </Td> </Tr> <Tr> <Td> 108th </Td> <Td> January 3, 2003--January 3, 2005 </Td> <Td> Republican Majority → </Td> <Td> Bill Frist </Td> <Td> Mitch McConnell </Td> </Tr> <Tr> <Td> 109th </Td> <Td> January 3, 2005--January 3, 2007 </Td> <Td> Dick Durbin </Td> <Td> Harry Reid </Td> </Tr> <Tr> <Td> 110th </Td> <Td> January 3, 2007--December 18, 2007 </Td> <Td> Democratic ← Majority </Td> <Td> Mitch McConnell </Td> <Td> Trent Lott </Td> </Tr> <Tr> <Td> December 19, 2007--January 3, 2009 </Td> <Td> Jon Kyl </Td> </Tr> <Tr> <Td> 111th </Td> <Td> January 3, 2009--January 3, 2011 </Td> </Tr> <Tr> <Td> 112th </Td> <Td> January 3, 2011--January 3, 2013 </Td> </Tr> <Tr> <Td> 113th </Td> <Td> January 3, 2013--January 3, 2015 </Td> <Td> John Cornyn </Td> </Tr> <Tr> <Td> 114th </Td> <Td> January 3, 2015--January 3, 2017 </Td> <Td> Republican Majority → </Td> </Tr> <Tr> <Td> 115th </Td> <Td> January 3, 2017--January 3, 2019 </Td> <Td> Chuck Schumer </Td> </Tr> <Tr> <Th> Cong - ress </Th> <Th> Dates </Th> <Th> Democratic Whip </Th> <Th> Democratic Leader </Th> <Th> Majority </Th> <Th> Republican Leader </Th> <Th> Republican Whip </Th> </Tr> </Table> <Tr> <Th> Cong - ress </Th> <Th> Dates </Th> <Th> Democratic Whip </Th> <Th> Democratic Leader </Th> <Th> Majority </Th> <Th> Republican Leader </Th> <Th> Republican Whip </Th> </Tr>

Who is the republican whip in the senate