These Young Women Didn’t Want to Vote for Biden. They’re All In on Harris.

Constance Lancelle, 22, of Milwaukee, was “definitely not interested in voting for Biden,” she said. But with Kamala Harris as the Democratic presidential candidate, she said, “I feel like politics have been a dream.”

Sierra Sanson, 23, of Medford, N.J., planned to vote for Jill Stein of the Green Party, or not at all. Now she’s thrilled to support Ms. Harris: “She’s a badass woman who I want to see succeed.”

Emily Baumel, 27, of Madison, Wis., hadn’t planned to vote for president, but will now vote for Ms. Harris: “I have a lot less dread; I like how much hope she’s giving people.”

Vice President Harris’s candidacy has reinvigorated many Democrats and independents — and particularly young women. Their newfound enthusiasm is evident in interviews, and in early signals from polls in swing states and nationwide.

As a group, young women were never going to support Donald J. Trump in the election, according to national New York Times/Siena College polls. But that had not always meant backing President Biden. His support among both women and the young (18 to 29), crucial to his 2020 victory, had been slipping before his exit from the race.

It’s still early in Ms. Harris’s candidacy, and the numbers of these voters included in polls are too small to make definitive conclusions, but so far she seems to be winning many of them back.