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Mamdani-backed Lander ousts Goldman in New York House primary

Lander, backed by Zohran Mamdani and other progressives, won with more than 60% of the vote, tightening the party’s divide over Israel and immigration.

  • On Tuesday, former New York City Comptroller Brad Lander defeated two-term incumbent Representative Dan Goldman in the Democratic primary for New York's 10th Congressional District, securing 65.8% of the vote.
  • Mayor Zohran Mamdani's endorsement fueled Lander's campaign, which centered on sharp policy clashes over Israel-Gaza and labor issues, positioning the challenger against the more moderate Goldman.
  • Despite Goldman outspending Lander more than 7-to-1 on airwaves according to AdImpact, Lander's grassroots momentum and progressive endorsements proved decisive in overcoming the incumbent's financial advantage.
  • The victory marked a broader sweep for Mamdani's progressive slate, as candidates Claire Valdez and Darializa Avila Chevalier also secured nominations in their respective districts on Tuesday night.
  • Lander is the heavy favorite for November's general election in the solidly Democratic district, though House Democrats may face ongoing friction as insurgent wins reshape party dynamics.
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Politico broke the news on Tuesday, June 23, 2026.
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