U.S. Sen. Bernie Sanders formally threw his weight behind presumptive Democratic candidate Joe Biden Monday, just days after exiting the White House race. 

Sanders said that Democrats must unite behind the former vice president if U.S. President Donald Trump is to be defeated in November’s nationwide election, imploring his supporters to back Biden.

“I’m asking every Democrat, I’m asking every independent, I’m asking a lot of Republicans to come together in this campaign to support your candidacy, which I endorse,” Sanders, the progressive standard-bearer, said during a livestream hosted by Biden’s campaign.

“Joe, I know that there is an

Read more: US: Bernie Sanders endorses Joe Biden's candidacy