Election 2024 updates: Harris interviewing top VP contenders Sunday, source says

Vice President Kamala Harris is set to take the stage in Atlanta Tuesday night for her largest campaign rally to date.

Among the guests will be Megan Thee Stallion and Quavo.

During her speech, the vice president will lay out how she will prioritize the strengthening of middle-class families as president, according to a Harris official.

She will say a key to this is recognizing that prices remain too high for many essentials that families rely on, and she will lay out her plans to lower costs.

She will also discuss the state of the race, reiterating that she is the underdog in this race but has real momentum and grassroots enthusiasm at her side, and she is expected to call out former President Donald Trump for refusing to honor his commitment to debate, the official said.

Following her remarks, Harris will join a national campaign organizing call to thank volunteers for their support and talk about more ways to get involved with the campaign, the official said.

-ABC News' Gabriella Abdul-Hakim, Frtiz Farrow, Isabella Murray and Will McDuffie

The overwhelming majority of the largest Democratic donors are pushing for Vice President Kamala Harris to pick Pennsylvania Gov. Josh Shapiro, Arizona Sen. Mark Kelly or Kentucky Gov. Andy Beshear, a top adviser to major Democratic donors told ABC News.

The source says many of them are making their views known to Harris’ team and have been pushing to have a say in the process after surging large amounts of money into her campaign.

The donors say Shapiro would make a good choice because he has massive charisma and is a political talent at "Obama level," he’s got a great brand in Pennsylvania and has chastised both Democrats and Republicans for being too extreme, according to the source.

Kelly's popularity among the donors comes from the fact that he's a veteran with real toughness, can talk about political violence from his personal perspective and has major name recognition and credibility in Arizona, the source said.

Beshear is popular among the donors because he’s a centrist southern Democrat who has successfully won in Kentucky two times, according to the source.

-ABC News' Selina Wang

Anita Dunn, a top adviser to President Joe Biden, is leaving the White House next week to advise the largest super PAC supporting Vice President Kamala Harris, a source close to Dunn told ABC News.

This marks the first major shakeup to Biden’s inner circle since he announced he was dropping out of the presidential race. Dunn played a key role in Biden’s 2020 campaign and was previously a top adviser to President Barack Obama’s 2008 and 2012 campaigns.

"It’s been an honor and privilege to serve in this White House, with this President and this team, during this transformational term," Dunn said in a statement shared with ABC News. "I am grateful to President Biden and Vice President Harris for their leadership and giving me the opportunity to be part of what they have accomplished for the American people."

Dunn will be a senior adviser to the super PAC Future Forward and an adviser to its partner organization Future Forward USA. She will work on super PAC efforts that will coordinate with the Harris campaign, according to the source close to Dunn.

Biden said in a statement that he was grateful for Dunn's work.

"I deeply value her counsel and friendship and I will continue to rely on her partnership and insights as we finish the job over the next six months," he said.

-ABC News' Selina Wang

Senate Majority Leader Chuck Schumer brushed off concerns Tuesday about keeping the Senate majority if Kamala Harris were to select a Democratic senator as her vice presidential pick.

"I have total confidence that Vice President Harris will choose a great vice-presidential candidate," Schumer said during his weekly press conference.

Schumer dodged a question about the possibility of a key swing state opening if Arizona Sen. Mark Kelly is chosen as Harris' running mate.

-ABC News' Lauren Peller