President Joe Biden has endorsed Vice President Kamala Harris as the Democratic presidential nominee in the 2024 election, moments after he announced he would not seek reelection this year.

“My fellow Democrats, I have decided not to accept the nomination and to focus all my energies on my duties as President for the remainder of my term,” Biden wrote on X/Twitter. “My very first decision as the party nominee in 2020 was to pick Kamala Harris as my Vice President. And it’s been the best decision I’ve made.

“Today I want to offer my full support and endorsement for Kamala to be the nominee of our party this year. Democrats — it’s time to come together and beat Trump. Let’s do this.”

Birmingham Mayor Randall Woodfin commented on Biden’s exit and decision to endorse Harris.

“President @JoeBiden’s endorsement of Vice President Harris speaks volumes,” Woodfin posted on X/Twitter. “Her leadership, resilience, and commitment to progress have been evident throughout his administration. Proud to stand with @KamalaHarris. Let’s get to work!”

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.

The decision comes after escalating pressure from Biden’s Democratic allies to step aside following the June 27 debate, in which the 81-year-old president trailed off, often gave nonsensical answers and failed to call out the former president’s many falsehoods.

Biden plans to serve out the remainder of his term in office, which ends at noon ET on Jan. 20, 2025.

“It has been the greatest honor of my life to serve as your President. And while it has been my intention to seek reelection, I believe it is in the best interest of my party and the country for me to stand down and to focus solely on fulfilling my duties as President for the remainder of my term,” Biden wrote in a letter posted to his X account.

The Associated Press contributed to this report.