Ms. Harris, who has already secured the support of a majority of Democratic delegates, is poised to become the official nominee at the party convention in August. Her endorsement by the Obamas follows President Joe Biden's announcement last Sunday that he would be withdrawing from the race.

In their statement, the Obamas emphasized their enthusiasm for Harris's candidacy. "We could not be more thrilled to endorse Kamala Harris," they said, pledging to do "everything we can" to help elect her. They praised President Biden's decision to choose Harris as his running mate, describing it as one of his best decisions and highlighting her extensive experience as California’s attorney general, a U.S. senator, and vice-president.

"Kamala has more than a resume," the statement continued. "She has the vision, the character, and the strength that this critical moment demands. There is no doubt in our mind 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 endorsement was also accompanied by a video showing Harris receiving a phone call from the Obamas, during which they pledged their support. "Oh my goodness," Harris exclaimed in the clip. "Michelle, Barack, this means so much to me."

In the wake of Biden's withdrawal, Harris has been active on the campaign trail, holding numerous events across the United States. On Thursday, she addressed the American Federation of Teachers union in Houston, an event that, while part of her vice-presidential duties, had the atmosphere of a campaign rally, complete with loud applause and cheers.

During her speeches, Harris has targeted "extremist" Republicans and their "failed" policies. “We want to ban assault weapons, and they want to ban books,” she said, highlighting the contrasts between her platform and that of her opponents.