TOPSHOT - A man holds a sign showing his appreciation for US President Joe Biden along Pennsylvania Avenue in front of the White House in Washington, DC, on July 21, 2024. Joe Biden on July 21, 2024 dropped out of the US presidential election and endorsed Vice President Kamala Harris as the Democratic Party's new nominee, in a stunning move that upends an already extraordinary 2024 race for the White House. Biden, 81, said he was acting in the "best interest of my party and the country" by bowing to weeks of pressure after a disastrous June debate against Donald Trump stoked worries about his age and mental fitness. (Photo by SAMUEL CORUM / AFP) (Photo by SAMUEL CORUM/AFP via Getty Images)