"Better Democrats" Elected: Mamdani-Backed Candidates Win NY Primaries

New York City's Democratic House primaries delivered a clean sweep on Tuesday for Mayor Zohran Mamdani's progressive movement.

Across four races, two incumbents were unseated by Mamdani-backed challengers, exposing a deepening rift between the party's establishment and its left flank ahead of the November midterms.

All three of Mamdani's endorsed candidates won, and all are considered near-certain winners in their heavily Democratic general-election matchups.

The 13th District: Youth Over Tenure

New York's 13th district delivered the night's biggest surprise. Darialize Avila Chevalier, a 32-year-old community organizer and member of Democratic Socialists of America (DSA), narrowly ousted five-term incumbent 71-year-old Rep. Adriano Espaillat.

Espaillat, the first Dominican-American elected to Congress and current chair of the Congressional Hispanic Caucus, carried endorsements from several prominent Democrats, including House Minority Leader Hakeem Jeffries.

His concession marked one of the more consequential incumbency losses in recent New York primary history.

Lander Won Decisively, Valdez Was Unopposed by an Incumbent

In the 10th congressional district, covering parts of lower Manhattan and Brooklyn, former New York City Comptroller Brad Lander decisively unseated two-term Rep. Dan Goldman, who also carried Jeffries' endorsement.

In the open 7th district seat, spanning Brooklyn and Queens, Mamdani-backed state Rep. Claire Valdez, a democratic socialist, won over Antonio Reynoso, who held the endorsements of retiring incumbent Rep. Nydia Velázquez and the Working Families Party. Velázquez is not seeking reelection.

"It's not just a question of electing more Democrats. It's a question of electing better Democrats," Mamdani told reporters.

The 12th Race and $20 Million in AI Money

In the race to succeed Rep. Jerry Nadler in Manhattan's 12th congressional district, state assemblyman Micah Lasher defeated fellow assemblyman Alex Bores, along with a broader field that included Jake Schlossberg, grandson of the late President John F. Kennedy.

The contest drew unusual national attention: 2 political action committees affiliated with major artificial intelligence companies combined to spend $20 million in the race, directing funds toward or against Bores' candidacy.

DSA's Structural Role and Mamdani's Trajectory

The DSA formally backed both Chevalier and Valdez, extending its track record, which already includes its role in Mamdani's own victory over former New York Governor Andrew Cuomo in last year's Democratic mayoral primary and his subsequent general election win.

The pattern is now consistent across 2 election cycles: DSA-aligned candidates, running on platforms critical of Israel and pressing for ambitious economic policy, are outperforming establishment-endorsed rivals in New York City's most competitive Democratic districts.

Mamdani framed the results in class terms: "I see in them a willingness to also put working people back at the heart of our politics."