President Biden on Friday dismissed arguments from Republicans that his administration’s new vaccine requirements amount to federal overreach and said some GOP governors are being “cavalier” with the health of their constituents. Asked about opponents vowing to challenge the new vaccination measures, Biden replied: “Have at it.” “I am so disappointed that particularly some Republican governors have been so cavalier with the health of these kids, so cavalier with the health of their communities,” Biden said during an appearance at a Washington, D.C., school. “We’re playing for real here, and this isn’t a game, and I don’t know of any...