"Here's a sentence I never thought I'd say, I'm Pete Buttigieg and you might recognize me from Fox News," he said as he introduced himself on stage.

Buttigieg frequently appears on the network to defend Biden-Harris policies.

Maryland Gov. Wes Moore discussed how he, Harris and other leaders came together to respond to the March collapse of the Francis Scott Key Bridge.

Moore talked about how several players came together to reopen the port in 11 weeks.

"We are a nation of patriots who serve when the mission is hard and who serve when the destination is uncertain," he said.

At the end of fired-up remarks, Oprah told the crowd: "Let us choose truth, let us choose honor and let us choose joy!"

"Because that's the best of America. But more than anything else, let us choose freedom. Why? Because that's the best of America. We're all Americans. And together, let's all choose Kamala Harris."

Oprah gave tribute to Tessie Prevost Williams, who died earlier this year. Williams was one of four Black girls who helped integrate New Orleans public schools in 1960.

She then tied Williams to Harris, saying Williams "paved the way for another young girl who, nine years later, became part of the second class to integrate the public schools in Berkeley, California.

"Harris famously reflected on her experience as a child being bused to school each day. During a spar with President Biden on the debate stage on busing, Harris told him: "That little girl was me."