NEW YORK — A small group of Jewish volunteers gathered under the streetlights of an Upper East Side park on Tuesday night, introducing themselves and stating their reasons for canvassing in support of New York City mayoral candidate Zohran Mamdani. The caustic mayoral campaign has pitted the far-left Mamdani, a harsh critic of Israel, against former New York governor Andrew Cuomo, a pro-Israel centrist. During the introductions, the volunteers donned “Jews for Zohran” shirts, heard a briefing on rent stabilization from an employee of a housing nonprofit, and got instructions on how to converse with voters, including how to de-escalate...