Zohran Mamdani’s election as New York’s next mayor exposed a deepening rift between traditional Democratic Jewish voters and younger progressives — one that could reshape politics for years in the metropolitan area with the world’s largest Jewish population outside Israel.

Mamdani, a 34-year-old democratic socialist, handily defeated Andrew Cuomo, the Democratic former governor of New York who ran as an independent, while beating back accusations of antisemitism over his support of Palestinians in the conflict in Gaza.

A Muslim immigrant, Mamdani benefited from a wave of anger over Israel’s conduct in Gaza among some Democrats and Jewish Americans who had initially supported it but grew disillusioned. That shift manifested itself in spring protests at Columbia University last year that M

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