Democratic Socialists Claim Three New York Primaries, Shaking the House Democrats' Moderate Core

Two sitting House Democrats — including the chair of the Congressional Hispanic Caucus — lost Tuesday night primaries to democratic socialist challengers, all backed by New York City Mayor Zohran Mamdani, in results that centrist lawmakers described as an "earthquake" and a "huge defeat" for Democratic leadership. The trio of victories is poised to double the number of Democratic Socialists of America members in Congress — that is, lawmakers affiliated with the DSA, a left-wing organization that sits well to the left of the party's mainstream and supports policies such as democratic public ownership of major industries.

The Three Races and Their Margins

Rep. Dan Goldman (D-N.Y.) lost reelection to Brad Lander, a former New York City comptroller, by more than 30 percentage points as of late Tuesday night — a result that many inside the caucus had anticipated. What caught members off guard was the defeat of Rep. Adriano Espaillat (D-N.Y.), the Congressional Hispanic Caucus chair, who fell more narrowly to democratic socialist Darializa Avila Chevalier, according to the Associated Press. Espaillat had "sounded very confident" before results came in, and low primary turnout had led allies to believe he would survive. In a third contest, State Assembly member Claire Valdez, also a democratic socialist, won a comfortable double-digit margin over Brooklyn Borough President Antonio Reynoso in the race to succeed retiring Rep. Nydia Velázquez (D-N.Y.).

Mamdani's Endorsement Machine Against Jeffries' Picks

All three winning candidates carried the endorsement of NYC Mayor Zohran Mamdani. House Minority Leader Hakeem Jeffries (D-N.Y.) had endorsed Goldman and Espaillat, and signaled a preference for Reynoso. Rep. Pramila Jayapal (D-Wash.), co-chair of the Congressional Progressive Caucus PAC, credited Mamdani's turnout operation and said the results reflected high progressive energy. Rep. Ro Khanna (D-Calif.) offered a simpler read: "The progressives beat the establishment in the heart of NYC."

Moderate Alarm and the Case for Counter-Organizing

Rep. Greg Meeks (D-N.Y.), a close ally of party leadership and chair of the Queens County Democratic Party, called it a tough night. Rep. Tom Suozzi (D-N.Y.), co-chair of the bipartisan Problem Solvers Caucus, delivered the starkest warning, telling Axios that opponents of the DSA "wring their hands at cocktail parties, while the DSA is organizing." A centrist lawmaker who spoke to Axios anonymously said the results prove that appeasement does not work and invoked former Speaker Nancy Pelosi as the model for how hard leadership must fight.

What Leadership Does Next

Jeffries' operation is focused on winning back the House majority in November, according to a source close to his office. Establishment Democrats pointed to centrist primary wins by Cait Conley in the New York City suburbs and former Rep. Ben McAdams in Utah as partial offsets. Those silver linings offered limited comfort to the anonymous centrist lawmaker, who predicted the incoming DSA members will be a "migraine" for leadership when Congress convenes in 2027 — a step up from the "headache" framing that lawmaker called an understatement.