NEW YORK — Zohran Mamdani, the mayor of New York, participated in victory celebrations with three candidates he supported in New York's primary elections. Mamdani defeated Andrew Cuomo in the Democratic primary for mayor of New York in June of the previous year.

Mamdani stated that the previous year's victory was not anomalous. "We are demonstrating that what happened last June, a year ago, was not an anomaly," Mayor Mamdani said. He added, "It was not the end. It was the beginning." Anna Bahr, Mamdani's communications director, said he is driving a distinct approach to politics. She stated, "Mayor Mamdani is driving a different kind of politics: not a politics funded by billionaires or led by consultants, but one that defends the needs of working people." Bahr further commented on the successful slate of candidates, stating, "That is precisely what New Yorkers are asking for, it is what the candidates he supports represent, and it is the reason why this slate won tonight."

Mamdani backed Ávila Chevalier, a former campaign volunteer, in her congressional bid against Adriano Espaillat. Ávila Chevalier participated in a demonstration the day after the Hamas attacks of October 7, 2023. This support occurred despite Espaillat endorsing Mamdani in the previous year's primary election. Two individuals close to the mayor indicated that Mamdani initially doubted Ávila Chevalier's chances of winning. Mamdani's decision to support Ávila Chevalier was made during a private meeting at City Hall with Democratic Socialists and other allies.

Mamdani also campaigned for Brad Lander and appeared on stage with him to celebrate Lander's victory less than an hour after polls closed. Mamdani advised another Democratic Socialist councilwoman not to run for Congress because he intended to support Lander. Representative Nydia Velázquez commented on Mamdani's approach. She asserted, "He made a strategic error by not understanding what it means to have relationships at the different levels of Government." Velázquez also noted, "For a city that depends on federal and state funds, one tries to expand their network of support, not reduce it, because you are going to need everyone's help." Several people familiar with the situation stated that Mamdani indicated Council Member Tiffany Caban and State Senator Julia Salazar were not acceptable candidates to succeed Velázquez.

In another instance, Mamdani opposed Council Member Chi Ossé's primary challenge against Representative Hakeem Jeffries. He mobilized the local chapter of the Democratic Socialists of America against Ossé. Mamdani later stated in a television interview that he wanted Jeffries to become Speaker of the House if Democrats secured the majority. Mamdani aligned with Claire Valdez, a first-term assemblymember who had supported him from the beginning of his mayoral campaign.