(Damon Winter/The New York Times) Caia Farrell, 11, and a friend of her mother’s, Tracia Collichio, with supporters of Democratic presidential candidate Joe Biden outside the Pennsylvania Convention Center, where vote counting continued, in Philadelphia, Nov. 6, 2020. “It is rare for American presidents to be defeated after a single term. This is the fifth time it happened in a century,” writes The New York Times columnist Michelle Goldberg. “It’s also, we shouldn’t forget, the first time a woman, in this case a Black woman, will become vice president.”