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’s and a prominent advocate of racial-justice legislation after the killing 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 U.S. history to be chosen for a presidential ticket. 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.