Republican efforts to highlight Joe Biden's lurch left during the Democratic primary are beginning to take form now that he's all but clinched the nomination.
But Sanders is under mounting pressure to drop out after performing poorly in several recent primaries including three states swept by Biden this week.
"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", Gabbard said in a statement.
Biden announced Jen O'Malley Dillon, a veteran Democratic operative, as his new campaign manager on March 12, two days after another round of primary victories widened his lead over Sanders.
The upstate New York Democrat and one-time presidential hopeful broke the news in the Washington Post, where she described Biden as the "best candidate" to beat Trump in 2020.
Bernie Sanders in 2016, never became a major factor for the Democratic Party's nomination.
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While challengers to presidents always play a reactionary role, that is especially true for Mr Biden, who has built his entire campaign as a juxtaposition with Mr Trump. "Sanders' love for our country and the American people and his honest desire to improve the lives of all Americans", she said. Bernard Sanders of Vermont are the only two major Democratic contenders still actively seeking the nomination.
Gabbard noted she was dropping out during a time of "unprecedented global crisis", and called for Americans to "work hand in hand to defeat this new enemy, the coronavirus". He said Ms. Gabbard "has put her life on the line in service of this country and continues to serve with honor today". I have a great appreciation for Senator Sanders' love for our country and the American people and his honest desire to improve the lives of all Americans.
Ms. Gabbard had said in October that she wouldn't seek reelection, which raises questions about her future plans. She had yet to be present on the debate stage in 2020.
"After she was treated so shamefully by the national committee, I don't understand why she's staying".
During the campaign Ms Gabbard had a public falling out with Hillary Clinton, and sparked speculation that she might stand as a third-party candidate in November, which would have damaged the Democrat nominee. Yeah, she's a Russian asset, I mean totally.
"We are really looking forward to convening with you virtually". Kamala Harris in July 2019, when Gabbard criticized the former prosecutor's record on marijuana and the death penalty.