The Democratic National Convention heads into its second day Tuesday, and a state-by-state roll call vote is scheduled to start later this afternoon.
Hillary Clinton is expected to be formally nominated as the Democratic presidential candidate during the vote.
In his Monday evening speech at the DNC, Bernie Sanders told his supporters he looks forward to their votes in the Tuesday roll call.
Sanders, however, stressed that "Clinton must become the next president of the United States."
"It is no secret that Hillary Clinton and I disagree on a number of issues. That is what this campaign has been about. That is what democracy is about," the Independent Senator from Vermont went on to say. "But I am happy to tell you that at the Democratic Platform Committee there was a significant coming together between the two campaigns and we produced, by far, the most progressive platform in the history of the Democratic Party. Among many many other strong provisions, the Democratic Party now calls for breaking up the major financial institutions on Wall Street and the passage of a 21st Century Glass-Steagall Act. It also calls for strong opposition to job-killing free trade agreements like the TPP. Trans-Pacific Partnership. We have got to make sure that TPP does not get to the floor of the Congress in the lame duck session.
"Our job now is to see that strong Democratic platform implemented by a Democratic-controlled Senate, by a Democratic House and a Hillary Clinton presidency - and I am going to do all that everything I can to make that happen."
His speech came after a rocky start to the convention amid the fallout over the leaked DNC emails, which appeared to show DNC officials working against Sanders' campaign in favor of Clinton.
Before announcing she would not open the convention Monday, outgoing DNC chair Debbie Wasserman Schultz was heckled as she attempted to speak to Florida's convention delegation. Sanders also got booed during a speech earlier Monday for asking his supporters to back Clinton.
The first day of the convention featured primetime speeches from First Lady Michelle Obama and U.S. Sens. Cory Booker (D-NY) and Elizabeth Warren (D-MA). On Tuesday, former President Bill Clinton will address the convention, as will mothers of gun or police violence.
UPDATE (4:30 p.m.): The roll call vote is now underway at the DNC.
UPDATE (5:45 p.m.): Hillary Clinton is officially the Democratic presidential nominee. She captured a majority of delegate votes Tuesday and is expected to accept the nomination during a speech Thursday.
UPDATE (5:56 p.m.): Bernie Sanders has moved to nominate Clinton by voice vote.