Mamdani-Backed Progressives Sweep New York Primaries — Letitia James Publicly Fumes

Tuesday night's New York Democratic primaries delivered a seismic result — and if you follow national politics at all, this one is going to matter well beyond the five boroughs.

Here's the quick version: New York City Mayor Zohran Mamdani's slate of fiery progressives swept establishment-backed Democrats in the state's congressional primaries, ousting two sitting congressmen in a resounding show of force. All three candidates Mamdani endorsed won. That's a clean sweep — and a very loud message to the Democratic Party establishment in Washington.

Who won, and who lost?

Rep. Dan Goldman, a two-term incumbent, was beaten by Mamdani-backed former City Comptroller Brad Lander. Rep. Adriano Espaillat, who leads the Congressional Hispanic Caucus, was defeated by Mamdani's most polarizing pick, Darializa Avila Chevalier, a democratic socialist who once helped organize pro-Palestinian protests at Columbia University. In the third race, Mamdani backed Claire Valdez over Brooklyn Borough President Antonio Reynoso — and Reynoso failed to earn the mayor's support despite winning the endorsement of the outgoing rep.

These aren't fringe districts either. All three progressive candidates won their primaries in safe seats, almost guaranteeing their election in November. In other words, barring something unexpected, three new democratic socialists are headed to Congress.

Who's furious about it?

New York Attorney General Letitia James — who actually backed Mamdani during his successful 2025 mayoral run — publicly broke with him over this. James bristled at Mamdani's growing clout, saying the candidates he supported "do not understand the politics of New York City, the cultural differences from district to district" and are "relatively new to the body politic."

James went on the record with CNN to express her disappointment — notable because many other Democrats chose to express their frustrations anonymously. She's not alone. The victories send a pointed message to House Democratic Leader Hakeem Jeffries, who campaigned aggressively against Mamdani's candidates and lost.

But James also tried to pump the brakes on the drama: "All of us are a little frustrated with the Democratic Party. But you don't blow it up," she said. "That's what MAGA has done."

What was actually driving these races?

Fiery debates over Israel policy defined all three races, as the challengers all sought to speak to the growing group of Democrats who soured on Israel amid its war in Gaza. All three called Israel's conduct "genocide" and made the issue an important piece of their campaigns. Both Lander and Goldman are Jewish, but their differing views on Israel's actions in Gaza made this one of the dominant issues in the race.

Beyond foreign policy, the winning candidates also ran hard on cost-of-living issues. These were leftist candidates who ran on some of the same issues that helped propel Mamdani to office — unafraid to criticize Israel or even some establishment Democrats, pushing for ambitious economic policies.

Why does this matter to you?

If you're a Democrat anywhere in the country, your party just had a very public internal fight — and the establishment lost. Mamdani and his slate were fighting to push the Democratic Party further left on key issues, even as establishment Democrats in Washington worried that their policies could alienate swing voters in midterm elections across the country this fall.

For Republicans, some have cast the socialist victories as a boon for the GOP, predicting that inflammatory comments made by the political newcomers could damage the Democratic Party's national branding.

Mamdani's election win last year was a shock to the Democratic Party and mainstream Jews, and Tuesday's results showed that his victory was not a one-off. The question now is whether what works in Brooklyn and the Bronx can travel — because the midterms are coming, and Democrats need to win seats far outside New York City to take back the House.