^The vice president of the United States is the president of the Senate, but not a member of the Senate itself and does not have a vote, unless there is a tie on the Senate floor.
^As vice president, Harris represents no state, but her home state is California.
^Kyrsten Sinema won election to the Senate as a Democrat in 2018[8] before leaving the party in 2022. As of March 2023, she receives committee assignments through the Democratic majority, but does not attend or participate in Senate Democratic Caucus meetings.[9]
^Elected to the seat to succeed Martha McSally, who had been appointed to the seat following the death of John McCain and the resignation of Jon Kyl.[10][11]
^Appointed to the seat following the resignation of Kamala Harris, who had become Vice President of the United States.
^Appointed to the seat following the resignation of Ken Salazar, who had become Secretary of the Interior.
^Elected to the seat to succeed Ted Kaufman, who had been appointed to the seat following the resignation of Joe Biden, who had become Vice President of the United States.
^Inauguration delayed in order to finish his term as Governor of Florida.
^Inauguration delayed as incumbent senator David Perdue's term expired on January 3, 2021, two days prior to the runoff election.
^Elected to the seat to succeed Kelly Loeffler, who had been appointed to the seat following the resignation of Johnny Isakson.
^Appointed to the seat following the death of Daniel Inouye.
^Elected to the seat to succeed Mo Cowan, who had been appointed to the seat following the resignation of John Kerry, who had become Secretary of State.[20]
^Appointed to the seat following the resignation of Al Franken.[21]
^Appointed to the seat following the resignation of Trent Lott.
^Appointed to the seat following the resignation of Thad Cochran.
^Appointed to the seat on January 12, 2023 following the resignation of Ben Sasse.
^Elected to the seat to succeed Jeffrey Chiesa, who had been appointed to the seat following the death of Frank Lautenberg.[25]
^Appointed to the seat following the resignation of Bob Menendez.
^Appointed to the seat following the resignation of Hillary Clinton, who had become Secretary of State.
^ Took office following the resignation of Tom Coburn.
^Took office following the resignation of Jim Inhofe.
^Elected to the seat following the resignation of Bob Packwood.
^Appointed to the seat following the resignation of Jim DeMint.
^Phil Gramm resigned (effective November 30, 2002) a few weeks before the expiration of his term in hopes that his successor, fellow Republican John Cornyn, could gain seniority over other newly elected senators. However, Cornyn did not gain additional seniority due to a 1980 Rules Committee policy.
^Joe Manchin won reelection to the Senate as a Democrat in 2018 before leaving the party in 2024. As of June 2024 he remains a member of the Senate Democratic Caucus.[4]
^Elected to the seat to succeed Carte Goodwin, who had been appointed to the seat following the death of Robert Byrd.
^Appointed to the seat following the death of Craig L. Thomas.
References
^"Maine Independent Angus King To Caucus With Senate Democrats". Politico. November 14, 2012. Archived from the original on December 8, 2020. Retrieved November 28, 2020. Angus King of Maine, who cruised to victory last week running as an independent, said Wednesday that he will caucus with Senate Democrats. [...] The Senate's other independent, Bernie Sanders of Vermont, also caucuses with the Democrats.
^"Senate group eyes Social Security changes as Biden hits Republicans over benefits". NBC News. March 3, 2023.
^Schonfeld, Zach (December 11, 2022). "Sanders calls Sinema 'corporate Democrat' who 'sabotaged' legislation".
^ a b"Sen. Joe Manchin leaves Democratic Party, registers as an independent". CBS News. May 31, 2024.
^Joint Committee on Printing, United States Congress (December 7, 2021). Congressional Pictorial Directory, One Hundred Seventeenth Congress (PDF). United States Government Publishing Office. Retrieved January 20, 2022.
^"About Coach". Office of United States Senator Tommy Tuberville. Retrieved January 20, 2022.
^"It's officially over: Top Arizona officials certify November election results". KTAR.com. December 3, 2018.
^Edmondson, Catie (November 4, 2020). "Mark Kelly Defeats Martha McSally in Crucial Arizona Senate Race". The New York Times. Retrieved December 2, 2020.
^Pathé, Simone (December 18, 2018). "Arizona Governor to Appoint Martha McSally to McCain's Senate Seat". Roll Call. FiscalNote. Retrieved December 2, 2020.
^"States in the Senate | Arkansas". United States Senate. Retrieved January 9, 2023.
^"About Chris". Office of United States Senator Chris Murphy. Retrieved January 20, 2022.
^"Biography: U.S. Senator Marco Rubio (R-FL)". Office of United States Senator Marco Rubio. Retrieved January 20, 2022.
^Davey, Monica (November 28, 2008). "The New Team: Tammy Duckworth". The New York Times. New York, NY.
^"States in the Senate | Indiana". United States Senate. Retrieved October 3, 2023.
^Rama, Padmananda (November 14, 2012). "Maine Independent Angus King to Caucus with Senate Democrats". National Public Radio. Retrieved November 30, 2020. Angus King of Maine, who cruised to victory last week running as an independent, said Wednesday that he will caucus with Senate Democrats... The Senate's other independent, Bernie Sanders of Vermont, also caucuses with the Democrats.
^"Senate group eyes Social Security changes as Biden hits Republicans over benefits". NBC News. March 3, 2023.
^Schonfeld, Zach (December 11, 2022). "Sanders calls Sinema 'corporate Democrat' who 'sabotaged' legislation".
^Seelye, Katharine Q. (June 25, 2013). "Democrat Wins Special Election for Kerry's Senate Seat". The New York Times. Retrieved May 21, 2020.
^"Franken to make announcement Thursday as chorus grows for his resignation". ABC7 Chicago. December 6, 2017. Retrieved December 9, 2017.
^writer, KAREN E. DAVIS Staff (March 9, 2023). "Daines leads GOP Senate bid with focus on Tester's Montana seat". The Belgrade News. Retrieved May 29, 2023.
^"Congressional candidate Jacky Rosen a newcomer, unknown to most Southern Nevadans". Reviewjournal.com. July 5, 2016. Retrieved February 5, 2019.
^"About Congresswoman Jacky Rosen". Archived from the original on December 21, 2018. Retrieved January 3, 2019.
^"Booker Wins New Jersey Senate Seat". Politico. Retrieved May 21, 2020.
^Tully, Tracey (August 23, 2024). "Menendez's Senate Replacement Has Been a Democrat for Just 5 Months". The New York Times. ISSN 0362-4331. Retrieved September 9, 2024.
^"States in the Senate | New York". United States Senate. Retrieved May 29, 2023.
^"Meet James | James serves Oklahoma". James Lankford. United States Senate. Retrieved May 29, 2023.
^Byrd, Caitlin (June 27, 2020). "Tim Scott's frustrating and fated fight for police reform: 'This is my issue'". Palmetto Politics. Archived from the original on June 29, 2020. Retrieved January 20, 2022.
^"Biography". Office of United States Senator John Thune. Retrieved January 20, 2022.
^"About Mike". Office of United States Senator Mike Rounds. Retrieved January 20, 2022.
^"Hagerty passes first bill in U.S. Senate". January 14, 2022. Retrieved January 20, 2022.
^"States in the Senate | Washington". United States Senate. Retrieved May 29, 2023.