DNC 2024 Day 1 live updates: Biden lays out choice to 'save democracy' with Harris

President Joe Biden posted a video on social media touting his accomplishments and prominently features Vice President Kamala Harris just ahead of his speech at the DNC on Monday evening.

"Thank you, America, for keeping the faith," Biden wrote in a post on X.

Throughout the video, images of Harris flash on the screen, including of her meeting with Parkland shooting victims' parents, meeting with world leaders and sharing a moment with Justice Ketanji Brown Jackson.

-ABC News' Fritz Farrow, Gabriella Abdul-Hakim and Will McDuffie

Greetings from the Windy City -- or, as Chicago should be called, the City of Conventions. Chicago has hosted more political conventions than any other city in America. Before the 26th major-party political convention in Chicago history kicks off, watch this video my colleagues and I made this morning to familiarize yourself with the history of the other 25.

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Greetings from the 2024 DNC in Chicago

538’s Nathaniel Rakich takes a look at the history of political conventions in the Windy City.

ABCNews.com

-538's Nathaniel Rakich

Rep. Tom Suozzi, a moderate Democrat who flipped a New York district held by ousted Rep. George Santos, campaigned heavily on immigration and messaging that the Democrats should be tougher on the issue.

But Suozzi told ABC News on Monday he's happy with how Vice President Kamala Harris has handled the key 2024 issue so far.

"She came out early in this campaign and continues to talk about how she would have supported the bipartisan Senate deal to secure the border. Now, I think we're going to hear more and more details about securing the border, fixing the asylum system and helping those people that have been here for decades, that have played by the rules to try and lift them up," Suozzi said.

When asked if he's spoken with Harris since she began her presidential bid, Suozzi said he has not but has spoken with her team. Suozzi is also set to speak at the convention this week.

On the ticket as a whole, Suozzi told ABC News: "I feel great. I'm so excited about this ticket. I'm excited by the enthusiasm I see from the voters, not only in my district, but throughout the country."

-ABC News' Oren Oppenheim

During a walk-through at the United Center ahead of his speech tonight, President Joe Biden said he was ready to pass the torch.

"Are you ready to pass the torch, sir?" a reporter asked from the floor while Biden did his stage check.

"I am," Biden answered from the podium, where he'll speak later tonight.

In response to questions about his message, he said: "You'll hear it tonight."

-ABC News' Cheyenne Haslett