By

Nia Prater,

Intelligencer staff writer, who covers New York politics

Mayor Zohran Mamdani rallies with his three endorsed House candidates: State Representative Claire Valdez, former New York City comptroller Brad Lander and Darializa Avila Chevalier at Kings Theater in the Brooklyn borough of New York, US, on Thursday, June 18, 2026.

In a series of closely watched primary elections that doubled as the first true test of Zohran Mamdani’s growing political movement, the mayor’s endorsed slate of allies and fellow democratic socialists swept to victory, securing open seats and ousting incumbents in a continuation of the political earthquake that sent Mamdani to City Hall.