New York holds its congressional primaries today, June 23, 2026, and the results will carry consequences far beyond the state. Control of the U.S. House of Representatives is in play this November, and New York's delegation of 26 seats sits near the center of that fight. The races playing out today also expose a deep fracture inside the Democratic Party, one that has been widening since New York City Mayor Zohran Mamdani swept to office in 2025.

These are not routine primaries. They are a stress test for the Democratic establishment, a first real measure of how much political power the new left carries into federal elections, and a preview of the ideological battles Congress will face after November.

Why New York's Primaries Matter This Year

Seven congressional races in New York City alone are drawing serious attention. Two long-serving incumbents, Rep. Jerry Nadler and Rep. Nydia Velazquez, chose not to seek reelection, opening seats that have sparked crowded, expensive primary fights. Vulnerable Democratic freshmen on Long Island are defending seats the party needs to hold to flip the House. And across the five boroughs, the Democratic Socialists of America have fielded a coordinated slate of candidates aligned directly with Mayor Mamdani.

New York has roughly 13.4 million registered voters, including about 6.4 million registered Democrats. Because New York runs closed primaries, only registered Democrats can vote in Democratic contests. In deeply blue New York City districts, winning the Democratic primary today is effectively winning the general.

The Democratic Party's Internal Divide

The clearest way to understand today's races is to look at who is endorsing whom. Governor Kathy Hochul, a moderate, is backing incumbents and establishment figures. Mayor Mamdani, a democratic socialist who took office in January 2026, is endorsing challengers who mirror his platform. The same intraparty fault line runs through every contested race.

Political observers describe this as a battle for the Democratic Party's identity, not just individual seats.

The Key Races Deciding the Direction of New York's Delegation

The three races drawing the most national attention each feature a version of the same conflict: progressive insurgency against Democratic incumbency.

New York's 10th District: Goldman vs. Lander

This is the most watched race in the state. Incumbent Rep. Dan Goldman, a two-term Democrat representing Lower Manhattan and parts of Brooklyn, faces former New York City Comptroller Brad Lander in a primary that has pulled in both Governor Hochul and Mayor Mamdani as surrogates on opposing sides.

Lander holds a commanding lead in the most recent public polling. A May 2026 Emerson College/PIX11 survey put Lander at 57% against Goldman's 23%, with voters under 40 backing Lander by a 73% to 15% margin. Mamdani and Senator Bernie Sanders headlined a rally for Lander on June 19. Hochul held a labor rally for Goldman on June 23, calling him someone who "knows where the levers of power are."

The candidates' differences are pointed:

  • Goldman argues his three years of congressional experience, federal oversight record, and labor union support make him the practical choice to check President Trump.
  • Lander frames Goldman as a "corporate Democrat" who takes AIPAC support and cannot deliver the bold agenda the moment demands.
  • Goldman has pledged to spend significant personal funds defending his seat.
  • Lander already holds the Working Families Party line for November, meaning he will appear on the general election ballot regardless of today's outcome.

New York's 13th District: Espaillat vs. Avila Chevalier

Rep. Adriano Espaillat, a five-term incumbent and chair of the Congressional Hispanic Caucus, faces Darializa Avila Chevalier, a 32-year-old Afro-Latina organizer with DSA and Justice Democrats support. Mamdani endorsed Avila Chevalier after initially signaling private support for Espaillat. As of June 22, Espaillat leads most polls at 35% against Avila Chevalier's 27%, but the race has tightened considerably since the Mamdani endorsement.

The contrast in this race tracks the wider party debate:

  • Espaillat has backing from the Congressional Hispanic Caucus, the Congressional Black Caucus, and AIPAC, with an emphasis on institutional experience and immigration reform.
  • Avila Chevalier calls for abolishing ICE, compared to Espaillat's position that ICE should be dismantled and replaced. That distinction has become a flash point in debates.
  • Social media posts from 2020 to 2022 in which Avila Chevalier criticized Kamala Harris, police, and military service members have given Espaillat sharp attack lines in the campaign's final weeks.

New York's 7th District: Reynoso vs. Valdez

This Brooklyn and Queens district is an open seat following Rep. Velazquez's retirement. Brooklyn Borough President Antonio Reynoso holds the Working Families Party endorsement, labor union backing, and the outgoing congresswoman's nod. Mamdani is backing state Assemblywoman Claire Valdez, 36, a DSA member running on abolishing ICE and ending U.S. military aid to Israel. Both candidates share progressive positions, making this a race over which strand of the left will claim the seat.

What the Rest of New York's Primary Landscape Tells Us

Beyond New York City, two additional races carry national implications.

Long Island Incumbents Under Pressure

Democratic freshmen Reps. Tom Suozzi (3rd District) and Laura Gillen (4th District) are both defending competitive seats on Long Island while facing contested Democratic primaries. These are swing districts the party must win in November to take back the House majority. A difficult primary fight weakens either candidate heading into November.

Elise Stefanik's Open Seat in the 21st District

Rep. Elise Stefanik is not seeking a seventh term after her withdrawn nomination for UN Ambassador and an aborted run for governor. State Assemblyman Robert Smullen holds local party backing to fill the seat. Business owner Anthony Constantino has a Trump endorsement. Deep-pocketed outside interests, including a crypto-focused super PAC, have been active in New York races this cycle, adding an outside money dimension to an already complicated field.

Tom DiNapoli Faces His First Primary Challenge

The state comptroller race is the only statewide Democratic contest on today's ballot. Tom DiNapoli, a five-term incumbent, is facing his first-ever primary challenge after nearly 20 years in office. Governor Hochul and Attorney General Letitia James are both running unopposed for their nominations.