Andrew Cuomo is staying on the New York City mayoral election ballot — a move that prompted critics to slam the ex-gov as a “spoiler” candidate. Sources confirmed that Cuomo will not decline to run on an independent ballot line, ahead of a Friday deadline to pull his name from the November ticket. Cuomo’s defiant stance comes as he hemorrhages union support after his stunning loss to socialist contender Zohran Mamdani in Tuesday’s Democratic primary – and amid widespread consternation that he’ll give the Queens assemblyman an easier path to Gracie Mansion. “Cuomo’s name in the race is fantastic for...