The two front-runners in the New York City mayor’s race, Andrew M. Cuomo and Zohran Mamdani, traded barbs over their records, immigration and a host of other issues.

Zohran Mamdani and Brad Lander criticized Andrew M. Cuomo in a largely substantive debate that at times turned heated. Mr. Cuomo targeted Mr. Mamdani, his closest competitor, whom he called too ...