Rep. Tulsi Gabbard Tulsi GabbardRepublicans call on DOJ to investigate Netflix over 'Cuties' film Hispanic Caucus campaign arm endorses slate of non-Hispanic candidates Gabbard says she 'was not invited to participate in any way' in Democratic convention MORE (D-Hawaii) dropped out of the 2020 presidential contest Thursday, endorsing former Vice President Joe Biden Joe BidenMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE in what is now officially a two-man primary with Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.).

Gabbard's withdrawal comes after dismally low finishes in every primary and caucus held thus far. She only garnered two delegates in total, both from American Samoa's caucuses.

Speculation has swirled over whether Sanders, too, will withdraw in the face of a seemingly unstoppable winning spree by the former vice president.

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Gabbard cited Biden's recent successes while announcing she is suspending her campaign, saying it was clear that Democratic voters have made their choice for a presidential nominee.

"After Tuesday's election, it is clear that Democratic Primary voters have chosen Vice President Joe Biden to be the person who will take on President Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE in the general election," she said.

Gabbard, who backed Sanders's 2016 presidential bid, joined several other former 2020 contenders in endorsing Biden this time.

"Although I may not agree with the Vice President on every issue, I know that he has a good heart and is motivated by his love for our country and the American people. I'm confident that he will lead our country guided by the spirit of aloha — respect and compassion — and thus help heal the divisiveness that has been tearing our country apart," she said.

"So today, I’m suspending my presidential campaign, and offering my full support to Vice President Joe Biden in his quest to bring our country together."

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Gabbard also extended her "best wishes" to Sanders and his campaign, saying she respects his "sincere desire to improve the lives of all Americans. "

The Hawaii Democrat persisted in her White House bid even after several other politicians who had polled higher and had heftier campaign accounts called it quits. Her withdrawal removes the final female candidate and last person of color from what started as a historically diverse primary field.

The Iraq War veteran and first Hindu member of Congress was forced to contend throughout her campaign with issues that had long made her a loner within the Democratic Party, including her past anti-LGBTQ rhetoric and infamous 2017 meeting with Syrian President Bashar Assad, who is held responsible for hundreds of thousands of civilian deaths in his country's civil war.

Gabbard raised eyebrows throughout the campaign with clashes with Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE, the Democratic presidential nominee in 2016, who accused her of being "a Russian asset" and planning a third-party bid in an interview last year.

"She's the favorite of the Russians, they have a bunch of sites and bots and other ways of supporting her so far, and that's assuming Jill Stein will give it up, which she might not, because she's also a Russian asset. Yeah, she's a Russian asset, I mean totally. They know they can't win without a third-party candidate," Clinton said.

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Gabbard sued Clinton for defamation over those comments in January.

Gabbard's political future is unclear — she declared last year she would not run for reelection for her House seat.

The Hawaii lawmaker thanked her campaign Thursday and said she would have conversations in the coming days regarding how to move forward.

"To the many people across our country who dedicated their time, energy, and resources to my campaign, working tirelessly to get our message out, I want to thank you from the bottom of my heart," she said. "I look forward to speaking to you more in the coming days about why I made this decision and how we can continue to work together for our common cause."