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)

President Joe Biden raises the hand of Vice President Kamala Harris after viewing the Independence Day fireworks display over the National Mall from the balcony of the White House, Thursday, July 4, 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, July 21, after he stepped aside amid widespread concerns about the viability of his candidacy. (AP Photo/Evan Vucci)

FILE - Sen. Kamala Harris, D-Calif. is seen on Capitol Hill, Jan. 10, 2017, in Washington. She's already broken barriers, and now Vice President 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/Cliff Owen, File)

FILE - San Francisco District Attorney Kamala Harris poses for a portrait in San Francisco, June 18, 2004. She's already broken barriers, and now Vice President 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/Marcio Jose Sanchez, File)

FILE - Vice President Kamala Harris, left, and President Joe Biden arrive for an event in the East Room of the White House, May 9, 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, July 21, after he stepped aside amid widespread concerns about the viability of his candidacy. (AP Photo/Evan Vucci, File)

FILE - California Attorney General Kamala Harris gives her first news conference in Los Angeles, Nov. 30, 2010. She's already broken barriers, and now Vice President 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/Damian Dovarganes, File)