Harris-Trump debate live updates: Stage set for showdown in tight presidential race

Gov. Tim Walz, Harris' running mate, previewed the vice president's upcoming debate with Trump in a fundraising email on Tuesday morning -- contrasting their campaign's message on the economy and freedom with Trump's platforms.

"She's going to show everyone watching what this movement is all about: supporting families like yours and mine and building a future where everyone has the opportunity not just to get by, but to get ahead," the email reads. "Donald Trump is sure to talk about his twisted version of freedom," Walz claimed in the email.

-ABC News' Isabella Murray

Harris and Trump will have a handful of surrogates representing them in the spin room following the debate.

Harris will have Govs. Josh Shapiro of Pennsylvania, Gavin Newsom of California, Roy Cooper of North Carolina and Michelle Lujan Grisham of New Mexico representing her in the spin room post debate, a campaign official confirmed to ABC News.

In addition to attending a watch party hosted by the Trump campaign, GOP vice presidential nominee Sen. JD Vance will also participate in the spin room.

Robert F. Kennedy Jr., Gov. Doug Burgum, tech entreprenuer Vivek Ramaswamy, Sen. Marco Rubio, Rep. Bryon Donalds, and Sen. Rick Scott are also expected to appear on behalf of Trump.

-ABC News’ Fritz Farrow, Gabriella Abdul-Hakim, Will McDuffie, Kelsey Walsh, Lalee Ibssa, and Soo Rin Kim

House Republican Conference Chair Elise Stefanik teed up her expectations for tonight's presidential debate, telling reporters that Harris "cannot hide forever."

"Tonight at the debate, the country will finally get to see the stark contrast between the strength and success of President Trump's America-first policies and the devastation and weakness of Kamala Harris's radical, failed, far-left agenda," Stefanik, the fourth-ranked House Republican, claimed at a news conference in the Capitol Tuesday morning.

-ABC News' John Parkinson

Harris' campaign said it's hosting more than 1,300 debate watch parties across the country, and running mate Gov. Tim Walz will deliver remarks at one of them in Phoenix Tuesday night.

The watch parties will be in all 50 states, with more than 100 planned on college campuses, according to the campaign. The events will be used for volunteers to make calls to battleground-state voters and share debate content on digital platforms.

More than 300 of the planned watch parties will be group specific, including Republicans for Harris-Walz and Veterans for Harris-Walz events in Arizona, North Carolina and Georgia. There will also be Latino house parties in Arizona and labor-organized events in Pennsylvania, according to the campaign.

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