He gave a rare Oval Office address to the nation, explaining why he dropped out of the presidential race.
During a rare Oval Office address to the nation, President Joe Biden said it's best to pass the "torch to a new generation."
"The defense of democracy is more important than any title," Biden said. "Nothing, nothing can come in the way of saving our democracy. And that includes personal ambition."
Said Biden, "I revere this office, but I love my country more."
In his address, he explained why he dropped out of the presidential race and outlined what he hopes to do in his remaining six months in office.
In the meantime, Vice President Kamala Harris is pushing ahead with campaigning for president days after Biden's decision.
With enough delegates secured to become the presumptive Democratic nominee if they keep to their pledges, Harris has held her first campaign rallies. At his first rally since Biden's announcement, Donald Trump attacked Harris while talking to voters in South Carolina.
Watch the video player below for the president's full remarks.
Click here for a list of the current Democrats who support her, and a few notable figures who haven't yet.
Minnesota Gov. Tim Walz, who is also the co-chair of the DNC's rules committee and the chair of the Democratic Governors Association, voiced his support for Kamala Harris in an X post on Monday.
"Thanks for the call, @KamalaHarris. You have my full support," Walz wrote. "Let's go win this thing."
Sen. Dick Durbin, the Senate's No. 2 Democrat, publicly endorsed Harris Monday morning.
"I'm proud to endorse my former Senate colleague and good friend, Vice President Kamala Harris. Our nation needs to continue moving forward with unity and not MAGA chaos," Durbin wrote in a statement.
"Vice President Harris was a critical partner in building the Biden record over the past four years. Count me in with Kamala Harris for President," Durbin added.
As Vice President Kamala Harris begins her 2024 presidential campaign following President Joe Biden's decision to end his reelection bid, predictions are swirling around possible Harris running mates.
ABC News' chief Washington correspondent Jonathan Karl weighed in on a few possible contenders for a potential Harris ticket this November.
Click here for a look at who Harris could pick as VP if she wins the Democratic nomination.
Maryland Gov. Wes Moore endorsed Harris for the top of the Democratic ticket on Monday.
In a post on X, Moore said "Today, I am proud to voice my full support and offer my full endorsement to Vice President @KamalaHarris to be the Democratic Nominee for President of the United States."
The governor, a Democrat, issued a statement on Sunday praising Biden for his decades of service.
"President Biden has dedicated his life and career to serving the American people," Moore wrote. "His legacy of hard work, dedication, optimism, and strength have shaped the trajectory of our nation -- and made us better as a people and as a country."
