Tuesday’s primary elections were seen as key inflection points for the direction of the Democratic Party, with New York City as a major battleground between established Democrats and the party’s more progressive wing. The outcomes of these races brought clear victories for progressives and showed the enduring influence of New York City Mayor Zohran Mamdani and the Democratic Socialists of America.

Mamdani-backed progressives win big in Democratic primaries

Tuesday’s congressional Democratic primary races were a test of the influence of Mamdani, who has maintained his popularity and progressive platform since taking office this year. The primaries were a clean sweep for Mamdani-backed candidates, with all three candidates endorsed by the mayor winning their races. Claire Valdez, Darializa Avila Chevalier and Brad Lander each won their congressional primaries in heavily Democratic districts, making it extremely likely that the three Mamdani-backed politicians will be elected to Congress in November.

The victories represent a large win for progressives. Valdez and Chevalier, like Mamdani, are members of the Democratic Socialists of America (DSA). Lander, a longtime democratic socialist who split with the DSA over its stance on Hamas, ran as a progressive; he and Mamdani previously endorsed one another when they both ran for mayor of New York City.

Democratic establishment hit hard in NYC

Tuesday’s New York races were also defeats for established Democrats. In the 13th Congressional District, Avila Chevalier defeated incumbent Democratic Rep. Adriano Espaillat, who made history as the first Dominican American elected to Congress and who currently chairs the Congressional Hispanic Caucus.

Valdez won an open race for the 7th District seat against Brooklyn Borough President Antonio Reynoso, who had the endorsement of outgoing Democratic Rep. Nydia Velázquez. And in the 10th District race, Lander defeated incumbent Democratic Rep. Dan Goldman, who had the backing of Democratic leaders such as House Minority Leader Hakeem Jeffries, D-N.Y.

Growing influence of Mamdani and democratic socialism

The election wins in New York continue the surging influence of the DSA, which, in addition to Mamdani, also includes New York Democratic Rep. Alexandria Ocasio-Cortez and enjoys a close relationship with independent Vermont Sen. Bernie Sanders.

The DSA has performed well in recent elections, with Janeese Lewis George likely to become the next mayor of Washington, D.C., and DSA-affiliated candidate Nithya Raman heading to a runoff against Los Angeles Mayor Karen Bass.

The clean sweep for Mamdani-backed primary candidates also demonstrates the enduring popularity of the New York City mayor, who has maintained the support of many of the city’s residents through his policies focused on affordability and quality-of-life issues, though some New Yorkers remain skeptical of the leftist mayor. Tuesday’s victories suggest that Mamdani’s influence extends beyond his personal charisma and can overcome the influence of more established Democrats.

Barring major unforeseen events, the three Mamdani-backed candidates who won on Tuesday will likely be elected to Congress in November. These results from New York City suggest that the influence of democratic socialism may be growing across the country, and these victories are strengthening the progressive wing of the Democratic Party.