WASHINGTON — Over a hundred migrants arrived near Vice President Kamala Harris’s home on Saturday evening, one of the chilliest Christmas Eves on record in the capital, according to a mutual aid group. Volunteers anticipated three buses with about 130 immigrants to arrive in New York on Christmas Day, but the buses were rerouted to the Washington area because of road closures and frigid conditions, said Madhvi Bahl, an organizer with the Migrant Solidarity Mutual Aid Network. Migrants arrived in Washington after a 36-hour journey, some with little more than a T-shirt or a light blanket, Ms. Bahl added. The...