"We need you in the White House. I will do all that I can to see that that happens, Joe," Sanders said to the former vice president during a livestream broadcast by Biden's campaign.
"Today, I am asking all Americans, 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 said.
Visit CNN's Election Center for full coverage of the 2020 race
Sanders said the two have agreed to form task forces to work on policy matters. "I look forward to working with you and bringing some great people into those task forces," he said.
"I think that your endorsement means a great deal. It means a great deal to me. I think people are going to be surprised that we are apart on some issues but we're awfully close" on others, Biden said. "I'm going to need you -- not just to win the campaign, but to govern."
This story is breaking and will be updated.
Copyright 2023 by Cable News Network, Inc., a Time Warner Company. All rights reserved.