Anna Filipic, of Washington, holds her daughter Louisa Monje, 2, outside the White House in Washington, Sunday, July 21, 2024, as they show support for President Joe Biden. Biden dropped out of the 2024 race for the White House on Sunday, ending his bid for reelection following a disastrous debate with Donald Trump that raised doubts about his fitness for office just four months before the election. (AP Photo/Susan Walsh)

A handmade sign for Vice President Kamala Harris appears on a lawn, Sunday, July 21, 2024, in Washington. She’s already broken barriers, and now Harris could soon become the first Black woman to head a major party's presidential ticket after President Joe Biden’s ended his reelection bid. The 59-year-old Harris was endorsed by Biden on Sunday, after he stepped aside amid widespread concerns about the viability of his candidacy. (AP Photo/Jacquelyn Martin)

FILE - Vice President Kamala Harris embraces President Joe Biden after a speech on healthcare in Raleigh, N.C., March. 26, 2024. President Joe Biden dropped out of the 2024 race for the White House on Sunday, July 21, ending his bid for reelection following a disastrous debate with Donald Trump that raised doubts about his fitness for office just four months before the election. (AP Photo/Matt Kelley, File)

Republican presidential candidate former President Donald Trump speaks at a campaign rally, Saturday, July 20, 2024, in Grand Rapids, Mich. (AP Photo/Evan Vucci)

Mattia Crovino, of Bologna, Italy, watches a news broadcast announcing that President Joe Biden has dropped out of the 2024 race for the White House, Sunday, July 21, 2024,. (AP Photo/David Goldman)

A news crawl appears on the side of the Fox News building in New York, Sunday, July 21, 2024, in the wake of President Joe Biden dropping out of the 2024 race for the White House. (AP Photo/Craig Ruttle)

Republican vice presidential candidate Sen. JD Vance, R-Ohio, of Ohio arrives to speak before Republican presidential candidate former President Donald Trump at a campaign rally, Saturday, July 20, 2024, in Grand Rapids, Mich. (AP Photo/Evan Vucci)

Balloons for President Joe Biden are brought to the White House in Washington, Sunday, July 21, 2024. Biden dropped out of the 2024 race for the White House on Sunday, ending his bid for reelection following a disastrous debate with Donald Trump that raised doubts about his fitness for office just four months before the election. (AP Photo/Susan Walsh)

George Ledbetter watches news of President Joe Biden dropping out of the 2024 race for the White House at They Say Restaurant in Harper Woods, Mich., Sunday, July 21, 2024. (AP Photo/Paul Sancya)

Republican presidential candidate former President Donald Trump speaks at a campaign rally, Saturday, July 20, 2024, in Grand Rapids, Mich. (AP Photo/Evan Vucci)

Supporters of Republican presidential candidate former President Donald Trump and Republican vice presidential candidate Sen. JD Vance, R-Ohio, hold signs in the audience at a campaign event, Saturday, July 20, 2024, at Van Andel Arena in Grand Rapids, Mich. (AP Photo/Carlos Osorio)

Republican presidential candidate former President Donald Trump arrives at a campaign rally, Saturday, July 20, 2024, in Grand Rapids, Mich. (AP Photo/Evan Vucci)

FILE - President Joe Biden arrives for the NATO summit in Washington, July 10, 2024. Biden dropped out of the 2024 race for the White House on Sunday, July 21, ending his bid for reelection following a disastrous debate with Donald Trump that raised doubts about his fitness for office just four months before the election. (AP Photo/Jacquelyn Martin, File)

A view of the White House is seen in Washington, Sunday, July 21, 2024. President Joe Biden dropped out of the 2024 race for the White House on Sunday, ending his bid for reelection following a disastrous debate with Donald Trump that raised doubts about his fitness for office just four months before the election. (AP Photo/Susan Walsh)

Hugh Kieve, 10, of Washington, holds a sign outside the White House in Washington, Sunday, July 21, 2024, as he and his family come out to show support for President Joe Biden. Biden dropped out of the 2024 race for the White House on Sunday, ending his bid for reelection following a disastrous debate with Donald Trump that raised doubts about his fitness for office just four months before the election. (AP Photo/Susan Walsh)

Supporters of Republican presidential candidate former President Donald Trump and Republican vice presidential candidate Sen. JD Vance, R-Ohio, carry a sign before a campaign event, Saturday, July 20, 2024, at Van Andel Arena in Grand Rapids, Mich. (AP Photo/Carlos Osorio)

Republican presidential candidate former President Donald Trump arrives at a campaign rally, Saturday, July 20, 2024, in Grand Rapids, Mich. (AP Photo/Evan Vucci)

Republican presidential candidate former President Donald Trump speaks at a campaign rally, Saturday, July 20, 2024, in Grand Rapids, Mich. (AP Photo/Evan Vucci)

FILE - Vice President Kamala Harris speaks at an event May 1, 2024, in Jacksonville, Fla. She’s already broken barriers, and now Harris could soon become the first Black woman to head a major party's presidential ticket after President Joe Biden’s ended his reelection bid. The 59-year-old Harris was endorsed by Biden on Sunday, July 21, after he stepped aside amid widespread concerns about the viability of his candidacy. (AP Photo/John Raoux, File)