Mamdani-Backed Candidates Sweep NYC Primaries, Expand Socialist Influence

New York City Mayor Zohran Mamdani scored a major political victory Tuesday night after all three congressional candidates he endorsed won their Democratic primary races, strengthening his grip on the city’s left-wing political machine and delivering a major boost to the democratic socialist movement.

The results marked one of the clearest tests yet of Mamdani’s influence following his rapid rise in New York politics.

His endorsed candidates won several closely watched House contests, defeating establishment-backed Democrats and reshaping the city’s political landscape ahead of November’s general election.

Two of the most striking results came from Brad Lander and Darializa Avila Chevalier.

Lander defeated incumbent Rep. Dan Goldman, D-N.Y., while Avila Chevalier ousted five-term Rep. Adriano Espaillat, D-N.Y.

In New York’s open 7th Congressional District, democratic socialist candidate Claire Valdez also won her race, despite outgoing Rep. Nydia Velázquez backing a different candidate.

Together, the victories gave Mamdani a clean sweep.

After Valdez’s win, Mamdani appeared at a celebration event and told supporters the results represented a break from the political establishment.

“The old politics that got us into this crisis is not the politics that’s going to get us out of this crisis,” Mamdani told the crowd.

Mamdani’s aggressive decision to intervene in congressional primaries had been viewed by some observers as a political gamble. Instead, the results reinforced his standing as one of the most powerful figures in New York Democratic politics.

Because the districts are expected to remain safely Democratic in November, the primary winners are now widely viewed as strong favorites to enter Congress next year.

That means New York’s congressional delegation is likely to move even further left, with more members aligned with democratic socialist politics and the activist wing of the party.

Fox News correspondent Bill Melugin highlighted the policy positions associated with the three Mamdani-backed candidates.

Darializa Avila Chevalier in New York’s 13th District has supported abolishing prisons, abolishing ICE, abolishing borders, defunding the police, and has said “all deportations are wrong,” including for violent criminals. She has also called the U.S. an “effing disgrace” and once wrote in a social media post, “I forgot to get napkins so I just wiped my hand on the American flag behind me.”

Claire Valdez in New York’s 7th District has backed citizenship and voting rights for illegal aliens, taxpayer funding for all transgender treatments, and eliminating private health insurance.

Brad Lander in New York’s 10th District has supported abolishing ICE, forgiving all student loans, a cost approaching nearly $2 trillion, and expanding the Supreme Court.

For Republicans, the results offered a clear warning sign about where the Democratic Party is heading.

Rep. Mike Lawler, R-N.Y., argued that Tuesday’s outcomes showed the growing power of Mamdani and the party’s socialist wing.

“Tonight’s results in New York City prove one thing,” Lawler wrote on X.

“The Democrat party has officially become the party of Zohran, AOC, & Bernie,” he added.

Conservative commentators made similar arguments, saying the victories give Republicans a sharper contrast heading into the 2026 and 2028 election cycles.

Jason Rantz argued on CNN that Republicans will use the results to portray democratic socialism as the face of the modern Democratic Party.

“Republicans are very obviously going to take advantage of this, and it’s going to hurt the Democrats nationwide,” Rantz said.

The New York results also come as progressive candidates have seen momentum in other states, including New Jersey and Pennsylvania, fueling concerns that the Democratic Party’s activist base is pulling the party further away from moderate voters.

Mamdani’s supporters see the wins as proof that democratic socialist candidates can defeat entrenched party figures and mobilize voters around left-wing economic and social policies.

But critics argue the results expose a dangerous ideological shift inside the Democratic Party.

Calls to abolish ICE, weaken law enforcement, expand federal power, eliminate private health insurance, grant voting rights to illegal aliens, forgive massive amounts of student debt, and pack the Supreme Court are not fringe internet slogans anymore.

They are increasingly attached to candidates winning Democratic primaries in major American cities.

The primary sweep also deepens the tension between Democratic establishment leaders and the party’s progressive activists.

For years, national Democrats have tried to reassure swing voters that the party is not controlled by its most radical voices. Tuesday’s results make that argument harder to sell.

Mamdani’s slate did not merely win symbolic victories.

It defeated sitting members of Congress, overcame establishment support, and positioned multiple socialist-aligned candidates to enter the House.

For conservatives, the message is clear: the Democratic Party’s leftward march is accelerating, and Republicans now have a powerful argument that the party of Biden, Obama, and Clinton is being replaced by the party of Mamdani, Ocasio-Cortez, and Sanders.

The battle for the future of the Democratic Party is no longer theoretical.

In New York, the socialist wing just won.