Former President Barack Obama has also endorsed Vice President Harris.
Vice President Kamala Harris wrapped up what has been a whirlwind week in the presidential race with her campaign saying Sunday it has raised more than $200 million in less than a week.
On Thursday night, Harris met with Israeli Prime Minister Benjamin Netanyahu and took the lead in addressing the public about their discussions.
Harris has secured commitments from enough delegates to become the presumptive nominee if they all honor their commitment when voting, according to ABC News reporting.
President Joe Biden and Vice President Kamala Harris spoke on Sunday, ahead of Biden's decision to end his bid for reelection and endorse Harris to be the next Democratic pick.
"Today I want to offer my full support and endorsement for Kamala to be the nominee of our party this year," Biden wrote in a statement on X.
In a statement on X, Sen. Cory Booker expressed his "profound gratitude" to Biden following news that he would end his reelection campaign.
"I cannot overstate the gravity of the noble and history-making decision that President Biden just made. The feeling that I have right now is one of profound gratitude," Booker wrote. "I am grateful that Joe Biden has been a friend, the most dedicated of public servants, and an extraordinary president."
"I am grateful that we have a president whose patriotism and love of country drove him to run and win against demagoguery in 2020, and who now, because of that same fierce love and devotion to his fellow Americans, has decided to be the bridge to a new generation of leaders," he wrote.
Democratic Senate Majority Leader Chuck Schumer praised President Biden's legacy and said he "put the country, his party, and our future first" with his decision Sunday.
“Joe, today shows you are a true patriot and great American,” he said.
Schumer's statement comes days after sources told ABC News that Schumer privately urged Biden to drop out of the race.
Schumer had a blunt conversation with Biden, sources said, making the case it would be best if Biden dropped out of the 2024 presidential race.
Vermont Sen. Bernie Sanders reacted to Biden's decision to end his bid for reelection on Sunday.
"Joe Biden has served our country with honor and dignity," Sanders wrote in a statement on X.
"As the first president to ever walk on a picket line with striking workers, he has been the most pro-working class president in modern American history," Sanders continued.
Sanders ran against Biden for the Democratic nomination in the 2020 presidential race.
"Thank you, Mr. President, for all you’ve done," Sanders wrote.
