Meanwhile, Bernie Sanders’s delegates booed Sanders himself at a delegate meeting Monday afternoon when he called for supporting Hillary Clinton.

Sen. Bernie Sanders: “We have got to defeat Donald Trump. And we have got to elect Hillary Clinton and Tim Kaine.”

Among those to try to quell the “Bernie or Bust” movement Monday was comedian Sarah Silverman, who appeared on stage at the DNC convention center alongside comedian and now Senator Al Franken. As the crowd shouted “Bernie! Bernie!” Silverman tried to shift the chant to “unity.” She then chastised Sanders supporters.

Sarah Silverman: “Unity, unity, unity.”

Sen. Al Franken: “Hillary, Hillary, Hillary.”

Sarah Silverman: “The Bernie—can I just say, to the Bernie or Bust people, you’re being ridiculous.”

Finally, following prime-time convention speeches by first lady Michelle Obama and Massachusetts Senator Elizabeth Warren, Sanders took to the stage, again endorsing Hillary Clinton.

Sen. Bernie Sanders: “Hillary Clinton will make an outstanding president, and I am proud to stand with her tonight. Thank you all very much.”

But on the convention floor, disunity was on full display. Sanders supporters sported shirts reading “Hill No.” Others taped their mouths shut, with the word “silenced” written in marker on the duct tape. This is Oregon delegate Sandra Jafarzadeh.

Sandra Jafarzadeh: “I covered my mouth with a 'silenced' sign on it. And the reason why I said that is because superdelegates didn’t represent the voice of the people. They were supposed to represent the voice of the middle class, the voice of the 99 percent. And they failed. They didn’t do that.”

We’ll host two debates on the choice for Sanders supporters later in the broadcast: first between Green Party presidential candidate Dr. Jill Stein and former NAACP President Ben Jealous, then between Pulitzer Prize-winning journalist Chris Hedges and former U.S. Labor Secretary Robert Reich.