Zohran Mamdani declared victory over former Gov. Andrew Cuomo in Tuesday night’s Democratic mayoral primary — a stunning upset that puts the socialist lawmaker within striking distance of becoming the youngest man in modern New York history to run City Hall. With more than 95% of ballots counted, returns from the city Board of Elections showed Mamdani leading Cuomo by a margin of roughly 44%-36%, prompting the former governor to concede the race. That breakdown gives Mamdani, a 33-year-old Queens Assembly member, more than enough of a margin to reach the 50% threshold required to win once the ranked choices...