Joe Biden ends campaign, endorses VP Kamala Harris, throwing election into unprecedented chaos

President Joe Biden ended his presidential campaign Sunday after a politically disastrous debate performance ignited lingering voter and party concerns about whether the 81-year-old was capable of serving a second term in office.

The president announced his decision in a letter posted to his campaign's X, formerly Twitter, account. Biden said he would fulfill his duties as president until his term ends in January and said he would speak to the nation "later this week in more detail about my decision."

He also endorsed his vice president, Kamala Harris, in a follow-up message. "I want to offer my full support and endorsement for Kamala to be the nominee of our party this year," he said.

The president is currently in Delaware, isolating as he recovers from COVID-19. A letter from his doctor early Sunday said his symptoms had "improved significantly."

The move came less than four weeks after the debate and was an acknowledgment of political reality after a steady drumbeat of Biden allies pushed the president publicly and privately to leave the race.

Lawmakers like Speaker Emerita Nancy Pelosi led the pressure campaign but she was joined by an array of financial world figures who eventually helped force the president to step aside with the threat of withholding future donations.

President Joe Biden waves on stage during the Vote To Live Properity Summit at the College of Southern Nevada in Las Vegas, Nevada, on July 16, 2024. (KENT NISHIMURA/AFP via Getty Images) · (KENT NISHIMURA via Getty Images)

Senate Majority Leader Chuck Schumer also reportedly pressed Biden to step aside in recent days. On Sunday, he reacted in a glowing statement toward Biden, saying that while his decision was "not easy," he "once again put his country, his party, and our future first."

One of the most prominent donor voices in recent weeks was George Clooney. The actor has helped raise millions for Biden but wrote in a New York Times essay he has witnessed Biden’s decline. The president, he added, isn’t "even the Joe Biden of 2020."

Yet for weeks, Biden and his allies tried to weather the storm.

As recently as Monday, in an interview with NBC News, Biden insisted nothing had changed and he was staying in the race “because the job’s not finished.”

But then in a BET interview that aired Wednesday, Biden acknowledged that he would consider withdrawing “if I had some medical condition that emerged.” Later Wednesday, the White House announced Biden had tested positive for COVID-19 and he traveled to Delaware to self-isolate.

President Joe Biden steps off Air Force One upon arrival at Dover Air Force Base in Dover, Del., on July 17, 2024. (KENT NISHIMURA/AFP via Getty Images) · (KENT NISHIMURA via Getty Images)

Over a dozen notable political figures joined the chorus in recent days asking Biden to step aside as the standoff between the president and his party reached a climax.

Rep. Adam Schiff, who is expected to become California’s next senator and is a close ally of Pelosi, told the Los Angeles Times, “I have serious concerns about whether the president can defeat Donald Trump in November.”