Vox and NYT just reported it. From The Times:
Kamala Harris Is Biden’s Choice for Vice President
A former rival for the Democratic nomination, she will be the first Black woman to be nominated for national office by a major political party.
Joseph R. Biden Jr. selected Senator Kamala Harris of California as his vice-presidential running mate on Tuesday, embracing a former rival who sharply criticized him in the Democratic primaries but emerged after ending her campaign as a vocal supporter of Mr. Biden and a prominent advocate of racial-justice legislation after the death of George Floyd in late May.
Ms. Harris, 55, is the first Black woman and the first person of Indian descent to be nominated for national office by a major party, and only the fourth woman in history to be chosen for one of their presidential tickets. She brings to the race a far more vigorous campaign style than Mr. Biden’s, including a gift for capturing moments of raw political electricity on the debate stage and elsewhere, and a personal identity and family story that many find inspiring.
Mr. Biden announced the selection over text message and in a follow-up email to supporters: “Joe Biden here. Big news: I’ve chosen Kamala Harris as my running mate. Together, with you, we’re going to beat Trump.’’
Okay. Let’s do this.