Socialist-backed candidates endorsed by Zohran Mamdani sweep New York primaries

New York’s political landscape shifted dramatically on Tuesday as socialist-backed candidates, endorsed by Mayor Zohran Mamdani, secured decisive victories in three Democratic primaries, doubling the number of Democratic Socialists of America (DSA) members in Congress and sending shockwaves through the party’s establishment. The results, described by one senior House Democrat as a “huge defeat,” underscore the growing influence of Mamdani’s left-wing coalition ahead of November’s midterm elections.
Rep. Dan Goldman (D-N.Y.), a prominent centrist, lost his reelection bid in a landslide to progressive former New York City comptroller Brad Lander, who led by over 30 percentage points. In another upset, Rep. Adriano Espaillat (D-N.Y.), chair of the Congressional Hispanic Caucus, was narrowly defeated by democratic socialist Darializa Avila Chevalier. Meanwhile, democratic socialist State Assembly member Claire Valdez triumphed over Brooklyn Borough President Antonio Reynoso in the race to succeed retiring Rep. Nydia Velázquez (D-N.Y.). All three victors were backed by Mamdani, whose endorsement and turnout operation were credited with driving the progressive wave.
The victories, which Axios described as an “earthquake,” will increase the DSA’s congressional delegation from two to four members, a development that has unsettled moderate Democrats. Rep. Tom Suozzi (D-N.Y.), co-chair of the bipartisan Problem Solvers Caucus, warned that the party’s moderate wing must “wake up” to the threat posed by democratic socialists, while another anonymous centrist House Democrat called the results a “migraine” for leadership come 2027. “Calling it a headache is an understatement,” the lawmaker said. “Holy sh*t. Buckle up.”
House Minority Leader Hakeem Jeffries (D-N.Y.) had endorsed Espaillat and Goldman, but his preferred candidates fell short. Jeffries had also signaled support for Reynoso, arguing he was backed by a coalition of progressive Democrats and unions, though the Brooklyn Borough president was ultimately outmaneuvered by Valdez’s socialist base. Progressive lawmakers, including Rep. Pramila Jayapal (D-Wash.) and Rep. Ro Khanna (D-Calif.), celebrated the results as evidence of the party’s leftward shift. “The progressives beat the establishment in the heart of NYC,” Khanna said. “The energy of our party is clearly with the left.”
The outcomes have left establishment Democrats scrambling. While some pointed to centrist victories in New York City suburbs and Utah as silver linings, the broader trend has alarmed party leaders focused on winning back the House in November. A source close to Jeffries’ operation told Axios he remains “laser-focused” on the midterms, but the primary results have exposed deep divisions within the party. As one senior House Democrat put it: “Yes, they are worried.”
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