NEW YORK (AP) — Candidates endorsed by New York City Mayor Zohran Mamdani won a series of high-profile Democratic congressional primaries Tuesday, strengthening the first-term mayor's political standing and signaling continued momentum for progressive activists within the state's Democratic Party. The victories included successful challenges against two incumbent members of Congress and another prominent Democratic officeholder, producing one of the most closely watched primary nights of the 2026 election cycle.

Mamdani, who was elected mayor in 2025 after campaigning on affordability and economic issues, had thrown his support behind a slate of candidates aligned with many of his policy priorities. Their wins reflected frustration among some Democratic voters with established party leadership and highlighted the continued influence of grassroots organizing in heavily Democratic districts. Political observers have viewed the races as an early test of whether the progressive coalition that helped propel Mamdani to City Hall could extend its reach into federal elections.