A few months ago, the “no-name” state assemblyman seemed destined to lose to Andrew Cuomo. On election night, he redrew the city’s political maps.

Zohran Mamdani delivered a political earthquake Tuesday in New York City’s Democratic mayoral primary, riding progressive demands for change in a city facing an affordability crisis to the brink of a stunning victory.

The concerns are deeply felt. Kathryn Wylde, chief executive of the Partnership for New York City, perhaps New York’ leading private sector business leadership organization, with a long history of working with city government, was asked to describe how business leaders felt about a Mamdani mayoralty. Her response? “Terror is the feeling.”