The endorsement, announced Friday in a video showing Harris accepting a joint phone call from the former first couple.
“We called to say Michelle and I couldn’t be prouder to endorse you and do everything we can to get you through this election and into the Oval Office,” the former president told Harris, who is shown taking the call as she walks backstage at an event, trailed by a Secret Service agent.
Said Michelle Obama, “I can’t have this phone call without saying to my girl, Kamala, I am proud of you.
“This is going to be historic,” she added.
Harris, who has known the Obamas since before his election in 2008, thanked them for their friendship and said she looks forward to “getting there, being on the road” with them in the three-month blitz before Election Day on November 5.