Zohran Mamdani, the official Democratic nominee for New York City mayor, ran his campaign largely on affordability, placing the New York City housing crisis at the center of his platform.

New York City frontrunner for mayor Zohran Mamdani has an ambitious agenda to tackle the city’s housing crisis. But the spiraling costs to develop affordable housing, President Donald Trump’s efforts to gut federal housing aid and other obstacles may derail his goals.