Alexander Hudlin, Jasper Emhoff and Arden Emhoff, Harris' nephews and niece, touted their aunt as someone who listened to their concerns and pushed them to never give up hope.

The three reciprocated that support.

"Most importantly, you're a baller," Alexander said.

"Let's win this thing," the three said together.

1:59

Kamala Harris' nephews, niece 'Let's win this thing'

Alexander Hudlin, Jasper Emhoff and Arden Emhoff, Harris' nephews and niece, touted their aunt as someone who listened to their concerns and pushed them to never give up hope.

There's some torch-passing in tonight's speaker lineup: from Clinton and Pelosi to Shapiro, Wes Moore, Pete Buttigieg and ending the night with Gov. Walz.

-ABC News' Rick Klein

Former House Speaker Nancy did not mention Trump by name during her speech, including when addressing Jan. 6.

"Never before had a president of the United States so brazenly assaulted the bedrock of our democracy, so gleefully embraced political violence, so willfully betrayed his oath of office," she said.

1:48

Pelosi does not mention Trump by name

Former House Speaker Nancy did not mention Trump by name during her speech, including when addressing January 6.

"Let us not forget who assaulted democracy on Jan. 6. He did! But let us not forget who saved democracy that day. We did."

She said lawmakers returning to the Capitol that same night demonstrated that "American democracy prevailed" and called on voters now to "reject autocracy" and "choose democracy" by electing Harris and Walz.

After a warm welcome from the crowd, former House Speaker Nancy Pelosi began her remarks thanking Biden for his "patriotic vision of a fairer America."

"Millions of jobs. Stronger infrastructure. A Biden child tax credit. Rescuing union pensions. Honoring our veterans. Bold climate action. Lowering the costs of prescription drugs," she said of the presidency's accomplishments, calling it one of the most successful of modern times.

Pelosi said Harris is now "ready to take us to new heights."

"Officially, she is a leader of strength, with wisdom and eloquence on policy -- most recently demonstrated fighting for women’s right to choose. Politically, she is astute and strategic in winning difficult elections -- quickly securing the nomination with dignity and grace and choosing Tim Walz as our vice president," Pelosi said.