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.
Over the last few hours since announcing she would seek the nomination for president, Vice President Kamala Harris has been making calls, a source told ABC News.
Harris has spoken with a range of Democratic officials, including congressional Democrats, governors, party officials and civil rights leaders, the source said.
-ABC News' Molly Nagle
President Joe Biden's son, Hunter Biden, is reacting to his father's decision to drop out of the race saying he has looked at his father "in awe" for his entire life.
"How could he suffer so much heartache and yet give so much of whatever remained of his heart to others?" Hunter Biden said in a statement Sunday.
"Over a life time I have witnessed him absorb the pain of countless everyday Americans who he’s given his personal phone number to, because he wanted them to call him when they were hurting. When their last hopes were slipping through their hands," he said.
Hunter Biden said his father's unconditional love has been his North Star as a president and parent
"He is unique in public life today, in that there is no distance between Joe Biden the man and Joe Biden the public servant of the last 54 years," Hunter Biden said.
"I’m so lucky every night I get to tell him I love him, and to thank him. I ask all Americans to join me tonight in doing the same. Thank you, Mr. President. I love you, Dad," he wrote.
Hunter Biden reacts to father dropping out of 2024 presidential race
Celebrities from across the entertainment spectrum, including Cher and Jon Stewart are weighing in on President Joe Biden's decision to drop out of the 2024 race for president applauding Biden's decision.
Talk show host and comedian Stewart reacted to the news with a one-word post on X shortly after President Biden’s announcement.
"Legend," wrote Stewart, seemingly reacting to Biden’s decision to leave the race, as well as his decades of public service.
Cher also commented on Biden's decision.
"Hadn’t Seen TV/Talked 2 Anyone,So Didn’t Know It Had Happened,” wrote Cher, who had urged Biden to “pass the baton“ on X moments earlier. “I Believe Its Only Chance 4:us: 2 Remain DEMOCRACY. DEM PARTY MUST ‘REALLY,’ ‘REALLY’ THINK OUTSIDE THE BOX. ‘WINNING IS ALL’,DONT WIN CANT CHANGE ANYTHING & THE TIMES THEY MUST BE A CHANGIN,” she wrote.
One of President Biden's closest allies, Michigan Rep. Debbie Dingell, mourned the end of Biden's presidential campaign while endorsing Vice President Kamala Harris on Sunday.
"I did endorse Kamala this afternoon because I believe Joe Biden has been a great President," Dingell said during an interview on MSNBC.
"I think it is a sad day and the way much of this has played out with the knives that have been put in his back," she said of Biden.
"If he is supporting Kamala Harris, that means that he thinks that she can do a good job and that is who I am supporting," Dingell continued, adding, "This party needs to unify."
