From The Washington Post:
During the roll call of states at the Democratic National Convention, Clinton secured the 2,383 delegates needed to secure the party’s nomination when the South Dakota delegation cast its votes.
In a bid to show party unity, Sen. Bernie Sanders, the runner-up for the nomination, appeared on the convention floor at the end of the process and made a motion to suspend the rules and declare Clinton the nominee by acclamation.
“I move that Hillary Clinton be selected as the nominee of the Democratic Party for president of the United States,” Sanders said, prompting the hall to erupt in applause.
And with the motion seconded, a loud roar of aye’s arose, making her the nominee at 6:56 p.m. Eastern time.
Soon after, Clinton sent out a video on Twitter showing Sanders’s remarks and declaring “Stronger together,” her campaign motto.
The orchestrated show of unity followed a rocky first day of the convention on Monday, when it became clear that some of Sanders’s supporters were not ready to accept Clinton as the party’s nominee despite the senator from Vermont urging them to do so.
Sanders’s gesture Tuesday night clearly did not bring all of his delegates into line. Many soon exited the hall, chanting, “Walkout! walkout! walkout!” As the program continued, most of the seats in delegations from Maine, Kansas, Alaska and Oklahoma — all states Sanders won against Clinton — were empty.
Several Oregon delegates, meanwhile, wrapped black cloth around their jaws, as gags, and headed into the hallway of the Wells Fargo Center. There they met dozens of angry delegates from other states, including Norman Solomon, a California delegate for Sanders who had been trying to organize a new Bernie Delegates Network into just this sort of protest.