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List of United States senators who switched parties

From Wikipedia, the free encyclopedia

This list includesUnited States senators who switchedparties while serving in the Senate.

List

19th century

Senator	State	Date	Congress	Old party	New party	Notes
James H. Kyle	South Dakota	1891	52nd	Independent	Populist
William Morris Stewart	Nevada	1893	53rd	Republican	Silver Republican	The Silver Republicans' seniority and committee assignments were not affected by their having left the party.^[1]
John P. Jones	Nevada	September 4, 1894	53rd	Republican	Silver Republican
Henry M. Teller	Colorado	June 17, 1896	54th	Republican	Silver Republican
Lee Mantle	Montana			Republican	Silver Republican
Richard F. Pettigrew	South Dakota			Republican	Silver Republican
Frank J. Cannon	Utah			Republican	Silver Republican
Fred Dubois	Idaho	1896		Republican	Silver Republican
James H. Kyle	South Dakota	1897	55th	Populist	Republican
William Morris Stewart	Nevada	December 4, 1899	56th	Silver Republican	Republican

20th century

Senator	State	Date	Congress	Old party	New party	Notes
John P. Jones	Nevada	1901	56th	Silver Republican	Republican
Fred Dubois	Idaho	1901		Silver Republican	Democratic	DuBois lost his re-election bid in1896, was again elected as a Silver Republican in1900, but became a Democrat early in the term.
Henry M. Teller	Colorado	March 4, 1901		Silver Republican	Democratic
Miles Poindexter	Washington	1913	63rd	Republican	Progressive
Miles Poindexter	Washington	1915	64th	Progressive	Republican
Robert M. La Follette Jr.	Wisconsin	1935	74th	Republican	Progressive	Caucused with the Republicans; briefly returned before losing in1946.
George W. Norris	Nebraska	1937	75th	Republican	Independent
Henrik Shipstead	Minnesota	1940	76th	Farmer–Labor	Republican
Wayne Morse	Oregon	1953	83rd	Republican	Independent
Wayne Morse	Oregon	February 17, 1955	84th	Independent	Democratic
Strom Thurmond	South Carolina	September 16, 1964	88th	Democratic	Republican
Harry F. Byrd Jr.	Virginia	1970	91st	Democratic	Independent	Kept seniority, but did not caucus with the Democrats
James L. Buckley	New York	1976	94th	Conservative	Republican
Richard Shelby	Alabama	November 9, 1994	103rd	Democratic	Republican
Ben Nighthorse Campbell	Colorado	March 3, 1995	104th	Democratic	Republican
Robert Smith	New Hampshire
		July 13, 1999	106th	Republican	Taxpayers
		August 1999		Taxpayers	Independent
		November 1, 1999		Independent	Republican

21st century

Senator	State	Date	Congress	Old party	New party	Notes
Jim Jeffords	Vermont	June 6, 2001	107th	Republican	Independent	Caucused with the Democrats. Gave Democrats temporary control of the senate.
Joe Lieberman	Connecticut	2006	110th	Democratic	Independent Democrat	Caucused with the Democrats. Lieberman was re-elected on theConnecticut for Lieberman ticket; however, he never formally joined that political party.
Arlen Specter^[2]	Pennsylvania	April 28, 2009	111th	Republican	Democratic	Originally a Democrat
Kyrsten Sinema^[3]	Arizona	December 9, 2022	117th	Democratic	Independent	Caucused with the Democrats
Joe Manchin^[4]	West Virginia	May 31, 2024	118th	Democratic	Independent	Caucused with the Democrats

See also

References

^"Senators Who Changed Parties During Senate Service (Since 1890)".United States Senate.
^"Longtime GOP Sen. Arlen Specter becomes Democrat".CNN. April 28, 2009. RetrievedApril 28, 2009.
^"Sinema leaving the Democratic Party and registering as an independent".CNN. December 9, 2022. RetrievedDecember 9, 2022.
^Irwin, Lauren (May 31, 2024)."Joe Manchin leaves Democratic Party, files as independent".The Hill. RetrievedMay 31, 2024.

v t e Party switching
Other terms include party hopping andcrossing the floor
By country	India Aaya Ram Gaya Ram Malaysia Frog New Zealand Waka jumping South Africa Floor crossing United States Party switching in the United States
Legislation	Anti-defection law Bangladesh Article 70 of the Constitution of Bangladesh India Anti-defection law New Zealand Electoral (Integrity) Amendment Acts South Africa Tenth Amendment of the Constitution of South Africa Ukraine Imperative mandate Vanuatu 2024 Vanuatuan constitutional referendum
Lists	Canada Canadian politicians who have crossed the floor Canadian politicians who have switched parties India Party switchers during Operation Kamala Ireland Irish politicians who changed party affiliation United Kingdom Elected British politicians who have changed party affiliation United States United States representatives who switched parties United States senators who switched parties
Category

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United States Congress

Members and leaders

Membership

Members	By length of service By shortness of service New members Non-voting members Unseated members Youngest members
Senate	Members seniority Dean Former Expelled or censured Classes Born outside the U.S. Resigned Appointed Switched parties
House	Members seniority Dean Former Expelled, censured, and reprimanded Served a single term Lost re-election in a primary Switched parties Elected but did not serve

Leaders

Senate	President list President pro tempore list Leaders Democratic Caucus Chair Secretary Policy Committee Chair Republican Conference Chair Vice-Chair Policy Committee Chair
House	Speaker list Leaders Bipartisan Legal Advisory Group Democratic Caucus Republican Conference

Districts

Groups

Congressional caucus	Caucuses of the United States Congress
Ethnic and racial	African-American members Senate House Black Caucus Arab and Middle Eastern members Asian Pacific American members Asian Pacific American Caucus Hispanic and Latino members list Hispanic Caucus Hispanic Conference Jewish members Jewish Caucus Native American members
Gender and sexual identity	LGBTQ members Equality Caucus Women Senate House Issues Caucus current House
Occupation	Physicians
Religion	Buddhist members Hindu members Jewish members Mormon (LDS) members Muslim members Quaker members Sikh members

Related

Powers, privileges, procedure, committees, history, media

Powers

Privileges

Procedure

Senate-specific

Items

House history
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Media

Capitol Complex onCapitol Hill and other headquarters offices

Legislative
offices

Offices

Senate	Curator Historical Library
House	Congr. Ethics Emergency Planning, Preparedness, and Operations Interparliamentary Affairs Law Revision Counsel Legislative Counsel Library

Employees

Senate	Secretary Chaplain Curator Historian Librarian Pages Parliamentarian Sergeant at Arms and Doorkeeper
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Library of
Congress

Gov.
Publishing Office

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Office
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Senate	Dirksen Hart Mountains and Clouds Russell
House	Building Commission office lottery Cannon Ford Longworth O'Neill Rayburn

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