Former President Barack Obama has endorsed Vice President Kamala Harris to be the Democratic presidential nominee, ending speculation about whether or not he would support her.
Former President Obama and former First Lady Michelle Obama said in a joint statement that they believe Ms. Harris has the "vision, character and strength that this critical moment requires."
Obama was said to be among more than 100 prominent Democrats Ms. Harris spoke to after President Joe Biden announced last Sunday that he would withdraw from the race.
In a statement at the time, Mr. Obama praised Biden's departure but did not endorse Ms. Harris.
The US vice president has already secured the support of a majority of Democratic delegates, putting her on track to become the official nominee at the party's convention in August.
The Obamas said in a statement on Friday that they could not be "more excited to support" Mrs Harris. They vowed to do "everything we can" to elect him.
"We agree with President Biden," the couple's statement said, "that choosing Kamala was one of the best decisions he has made.
They cited her record as California attorney general, US senator and then vice president.
"But Kamala has more than a resume," the statement continued. "She has the vision, character and strength that this critical moment requires.
"There is no doubt in our minds that Kamala Harris has exactly what it takes to win this election and deliver for the American people.
"At a time when the stakes have never been higher, she gives us all reason to hope."
The statement was accompanied by a video of Ms Harris taking a phone call from Mr Obama pledging their support.
Ms Harris has held a series of campaign events across the US in the days since Biden withdrew from the race. On Thursday, she addressed the American Federation of Teachers union in Houston.
While the event was billed as part of her vice presidential duties, it had the air of a campaign rally, with loud applause and cheers from the audience.
Echoing language used at campaign events on Tuesday and Wednesday, Ms Harris took aim at what she called "extremist" Republicans and "failed" policies.
"We want to ban assault weapons and they want to ban books," she said.
On Thursday, Republican presidential nominee Donald Trump continued to aim to attack his new rival.
"Lyin' Kamala Harris is a radical left-wing Marxist, and worse!" he said in a partially capitalized post on his social media platform Truth Social.
Mr Trump also refused to commit to a televised debate with Ms Harris until she was officially confirmed as the party's nominee.
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