“We share a common goal. And together we’ll defeat Donald Trump. We’ll defeat him together. We’ll bring this nation together,” Biden said from Philadelphia, where he flew after also canceling a rally in Cleveland because of fears about the coronavirus. “Donald Trump’s ‘America First’ policy made America alone.”

After Biden walked away from cameras and left the room, his staffers jumped across the museum floor, dancing, laughing and clapping to the song “Bring Me a Higher Love” blaring over the speakers. People carrying “Biden for President” signs then converged and began chanting “Let’s Go Joe” and ended by exchanging long hugs.

The moment felt like a celebration of much more than a few primary wins.

The humility of Biden’s speech masked the beatdown he delivered. Sanders was on pace to receive less than 15 percent of the vote in Mississippi. In Missouri, Biden’s share of the vote nearly doubled Sanders’. And in Michigan, the former vice president had a double-digit lead.

“I don’t think the revolution is done, but I think Bernie Sanders’ chances of being president are done,” said Kevin Cate, adviser to former presidential candidate Tom Steyer.

“Biden is winning almost everywhere,” Cate added, “and cable news has decided he’s the nominee. And there’s no stopping that train once it starts going.”

In winning Michigan and Idaho, Biden flipped two states Sanders had won in the 2016 primaries. Biden carried three other similar states — Minnesota, Maine and Oklahoma — on Super Tuesday. Sanders carried Washington and North Dakota in 2016.

In play in Tuesday's primaries were 352 delegates of the total 3,979. After Tuesday, 47 percent of delegates will have been awarded. Biden entered the night leading Sanders, 664-573.

Biden’s early wins on Tuesday were so significant that they could put him on a path to clinch the needed delegates prior to the July convention. The scale of his victory already started to resemble last week’s Super Tuesday, when Biden won 10 of 14 states.