Vermont Sen. Bernie Sanders formally endorsed former Vice President Joe Biden for president on Monday.
Sanders, who resisted declaring a full endorsement of the former veep after suspending his campaign last week, appeared in a livestream with Biden on Monday.
"We need you in the White House. I will do all that I can to see that that happens, Joe," Sanders said.
The two Democrats announced that they formed task forces to hammer out the party’s platform.
"It's no great secret out there, Joe, that you and I have our differences, and we're not going to paper them over. That's real," Sanders said. "But I hope that these task forces will come together utilizing the best minds and people in your campaign and in my campaign to work out real solutions to these very, very important problems."
"I think that your endorsement means a great deal," Biden replied. "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 a whole bunch of others. I'm going to need you -- not just to win the campaign, but to govern."
Some Sanders advisers not backing Joe:
Despite Sanders’ endorsement, his press secretary Briahna Joy Gray refused to go along.
"With the utmost respect for Bernie Sanders, who is an incredible human being & a genuine inspiration, I don't endorse Joe Biden," she said. "I supported Bernie Sanders because he backed ideas like #MedicareForAll, cancelling ALL student debt, & a wealth tax. Biden supports none of those."
Other fans of Sanders expressed similar sentiments after the endorsement.
Obama to endorse this week:
Former President Obama is expected to officially endorse Biden on Tuesday.
Obama has been quiet on the Democratic race but is expected to become a major voice now that Biden is the presumptive nominee.
Sen. Elizabeth Warren is also in talks with the Biden campaign about the timing of her endorsement.
Warrens’ campaign advisers have also been in discussions about joining the Biden effort.