The Political Power of Mamdani’s Positive Message and Coalition Building

Overnight, the political landscape of America’s largest city has been turned on its head.

For the Democratic establishment, waking up to the victory of Zohran Mamdani, a 33-year-old democratic socialist who defeated Andrew Cuomo in New York City’s mayoral primary on Tuesday, may be something of a shock.

It was also a vivid display of Democrats building power outside the traditional party establishment.

Mamdani, a Queens assemblyman, ran a welcoming campaign...