Independent Democrat

In U.S. politics, an independent Democrat is an individual who loosely identifies with the ideals of the Democratic Party but chooses not to be a formal member of the party (chooses to be an independent) or is denied the Democratic nomination in a caucus or primary election. Independent Democrat is not a political party. Several elected officials, including members of Congress, have identified as independent Democrats.

U.S. Congress
In the 118th Congress, four politically independent U.S. Senators caucus with the Democrats:
 * Angus King, Maine (2013–present), 72nd Governor of Maine (1995–2003)
 * Joe Manchin, West Virginia (2010–present), 34th Governor of West Virginia (2005–2010)
 * Bernie Sanders, Vermont (2007–present), U.S. Representative from VT-AL (1991–2007)
 * Kyrsten Sinema, Arizona (2019–present), U.S. Representative from AZ-09 (2013–2019)

State Legislators
There are thirteen politically independent state legislators that caucus with the Democrats or consistently vote with the party:
 * Shaun Filiault, Member of the New Hampshire House of Representatives (2022–present)
 * Alyse Galvin, Member of the Alaska House of Representatives (2023–present)
 * Rebecca Himschoot, Member of the Alaska House of Representatives (2023–present)
 * Megan Hunt, Member of the Nebraska Legislature (2019–present)
 * Jed Lipsky, Member of the Vermont House of Representatives (2023–present)
 * Mia McLeod, Member of the South Carolina Senate (2017–present), Member of the South Carolina House of Representatives (2011–2017)
 * Dan Ortiz, Member of the Alaska House of Representatives (2015–present)
 * Kelly Pajala, Member of the Vermont House of Representatives (2017–present)
 * Maria Perez, Member of the New Hampshire House of Representatives (2022–present)
 * Bill Pluecker, Member of the Maine House of Representatives (2018–present)


 * Calvin Schrage, Minority Leader of the Alaska House of Representatives (2023–present), Member of the Alaska House of Representatives (2021–present)
 * Laura Sibilia, Member of the Vermont House of Representatives (2015–present)
 * Shanda Yates, Member of the Mississippi House of Representatives (2020–present)

19th century
The first member of the United States House of Representatives to identify as an independent Democrat was Zadok Casey of Illinois, who served from 1833 to 1843. Casey was a Jacksonian Democrat before becoming an independent.

In 1848, a candidate for Mayor of Chicago, James Hutchinson Woodworth, labelled himself an independent Democrat to distance himself from what was at the time a corrupt and disorganized Chicago Democratic party organization; he preferred being described as an independent Democrat rather than as a Whig as that party was itself experiencing a transition. Woodworth won the 1848 Chicago mayoral election against Democrat James Curtiss with 59% of the vote. He won re-election with 80% of the vote in the 1849 election. Woodworth later served one term in the U.S. House of Representatives as a member of the Republican Party.

Andrew Jackson Hamilton of Texas briefly served in the U.S. House of Representatives as an independent Democrat. He later served as the 11th Governor of Texas and became a member of the Republican party.

20th century
Strom Thurmond of South Carolina was elected to the United States Senate in 1954 and served as an independent Democrat in the 84th Congress until his resignation on April 4, 1956. In November of that year he was elected as a Democrat to fill the vacancy created by his resignation. Thurmond later became a member of the Republican Party in 1964.

Harry F. Byrd Jr., a senator from Virginia, left the Democratic Party in 1970. He continued to caucus with the Democrats and referred to himself as an independent Democrat.

Patrick Lucey was a Democrat who ran as an independent as a vice-presidential candidate in 1980 with John B. Anderson.

David Orr, who served as Mayor of Chicago briefly in 1987, entered politics as an independent Democrat.

21st century
After failing to be re-nominated in the 2006 Democratic primary, U.S. Senator Joe Lieberman of Connecticut created a new party called the Connecticut for Lieberman party. He had lost the nomination to his own seat to Ned Lamont by a 52% to 48% margin. Lieberman won the general election with 49.7% of the vote to Lamont's 39.7%. He had stated while campaigning that if elected he would continue to caucus with the Democrats. Within the week following the election, Lieberman stated that he was "an Independent Democrat, capital I, capital D," and that he had specified as much to the secretary of the Senate. He continued to caucus with the Senate Democrats who had a slim majority in the 110th Congress. Lieberman remained a registered independent until he left Congress in 2013.

Four members of the New York State Senate–Jeffrey Klein, Diane Savino, David Valesky, and David Carlucci–indicated they would form a similarly designated caucus separate from the Democratic conference in 2011, known as the Independent Democratic Conference (IDC). Following the 2009 New York State Senate Leadership Crisis the IDC formed a coalition government with then New York Senate Republican leader Dean Skelos to give Republicans control of the New York State Senate. In April 2018, the IDC announced they would dissolve and following the primary defeat of six of the eight members in the 2018 elections, returning the New York State Senate to Democratic control in 2019.

U.S. Senator Bernie Sanders of Vermont, the longest-serving independent politician in congressional history, was initially denied caucus membership by the Democratic Party, however he eventually caucused with the party in both the U.S House of Representatives and the U.S. Senate. He has criticized the Democratic Party from a socialist perspective, though sought the Democratic nomination for president in 2016 and 2020.

U.S. Senator Angus King served as Governor of Maine from 1995 to 2003, and was the only Independent governor in the United States during that period. He positioned himself as a centrist during his tenure, and later ran for Senate in 2012 on the same premise. He has caucused with Senate Democrats since 2013, and briefly considered caucusing with Republicans after the 2014 Senate elections.

U.S. Senator Kyrsten Sinema of Arizona was elected as a Democrat in 2018, switching her affiliation from Democrat to Independent in December 2022, effective upon commencement of the 118th Congress. She has opted to caucus with neither party, while maintaining her seniority and committee assignments through the Senate Democratic Caucus. Sinema announced she would not seek re-election in 2024.

U.S. Congressional candidates Cara Mund, Evan McMullin, and Al Gross have all run as independents while receiving endorsements or support from their respective states' Democratic Parties in traditionally Republican states.