John Thune

John Thune
Official portrait, 2021
Senate Majority Leader
Assumed office
January 3, 2025
WhipJohn Barrasso
Preceded byChuck Schumer
United States Senator
from South Dakota
Assumed office
January 3, 2005
Serving with Mike Rounds
Preceded byTom Daschle
Senate positions
Leader of the Senate Republican Conference
Assumed office
January 3, 2025
Preceded byMitch McConnell
Senate Minority Whip
In office
January 20, 2021 – January 3, 2025
LeaderMitch McConnell
Preceded byDick Durbin
Succeeded byDick Durbin
Senate Majority Whip
In office
January 3, 2019 – January 20, 2021
LeaderMitch McConnell
Preceded byJohn Cornyn
Succeeded byDick Durbin
Chair of the Senate Commerce Committee
In office
January 3, 2015 – January 3, 2019
Preceded byJay Rockefeller
Succeeded byRoger Wicker
Chair of the Senate Republican Conference
In office
January 26, 2012 – January 3, 2019
LeaderMitch McConnell
Vice ChairRoy Blunt
Preceded byLamar Alexander
Succeeded byJohn Barrasso
Chair of the Senate Republican Policy Committee
In office
June 17, 2009 – January 26, 2012
LeaderMitch McConnell
Preceded byJohn Ensign
Succeeded byJohn Barrasso
Member of the U.S. House of Representatives
from South Dakota's at-large district
In office
January 3, 1997 – January 3, 2003
Preceded byTim Johnson
Succeeded byBill Janklow
Personal details
BornJohn Randolph Thune
(1961-01-07) January 7, 1961
PartyRepublican
Spouse
Kimberley Weems
(m. 1984)
Children2
EducationBiola University (BA)
University of South Dakota (MBA)
Signature
WebsiteSenate website
Campaign website

John Randolph Thune (/θn/ THOON; born January 7, 1961) is an American politician serving as the senior United States senator from South Dakota, a seat he has held since 2005. From 1997 to 2003, he was the U.S. representative for South Dakota's at-large congressional district. A Republican, Thune has been the Senate majority leader and Senate Republican leader since January 2025.

A South Dakota native, Thune is a graduate of Biola University and the University of South Dakota. He was elected to the House of Representatives in 1996 and reelected in 1998 and 2000. He first ran for the U.S. Senate in 2002, narrowly losing to incumbent senator Tim Johnson. In 2004, Thune ran for Senate again and defeated Senate Democratic leader Tom Daschle, making Daschle the first incumbent Senate leader to lose an election since 1952.

During his Senate tenure, Thune has served as the Republican chief deputy whip (2007–2009); chair of the Senate Republican Policy Committee (2009–2012); Senate Republican Conference chair (2012–2019); majority whip (2019–2021); and minority whip (2021–2025).

In 2024, Thune was elected Senate Republican leader, succeeding Mitch McConnell.