Three New York Democrats backed by Mamdani win House seat primaries; 2 incumbents lose

Illapa Sairitupac, Democratic New York State assembly candidate, from left, Zohran Mamdani, mayor of New York, and Brad Lander, former New York City comptroller and US Democratic House candidate for New York, campaign during a primary election in New York, US, on Tuesday, June 23, 2026. Adam Gray | Bloomberg | Getty Images Three progressive candidates endorsed by New York City Mayor Zohran Mamdani won Democratic primaries for House seats on Tuesday night, ousting two incumbents in the process. Brad Lander, who previously was the city's comptroller, defeated incumbent Rep. Dan Goldman in the 10th congressional district, which includes parts of lower Manhattan and Brooklyn. Darializa Avila Chevalier bested Rep. Adriano Espaillat in the 13th District, which covers upper Manhattan and parts of The Bronx. And the third Mamdani-endorsed candidate, Claire Valdez, won the primary for what will be an open House seat representing the 7th District, which includes neighborhoods in Brooklyn and Queens. Incumbent Rep. Nydia Velázquez, who currently represents the district, is not seeking reelection. The Democratic Socialists of America backed Chevalier and Valdez. A year ago, the DSA's organizational efforts helped Mamdani stun the local and national political world by soundly defeating former New York Gov. Andrew Cuomo in the Democratic mayoral primary, and months later in the general election. In another closely watched race, to succeed Rep. …