Candidates endorsed by New York Mayor Zohran Mamdani achieved a notable success in Tuesday's Democratic primary elections, with progressive challengers unseating established incumbents in key races. The outcomes reflect divisions within the Democratic party, particularly concerning the Israel-Gaza war.
In the 10th congressional district, progressive challenger Brad Lander defeated two-term incumbent U.S. Congressman Dan Goldman. Lander, who has publicly accused Israel of genocide in Gaza, secured a decisive victory with 65.7% of the vote compared to Goldman's 34.1%. Goldman had received backing from pro-Israel groups. Lander's campaign also garnered support from Vermont's Democratic socialist Senator Bernie Sanders. Mamdani, who describes himself as a democratic socialist, celebrated Lander's win, highlighting his "vision of politics that is more than what we've seen for so long." Mamdani's political philosophy, characterized by a focus on worker advocacy and increased taxation on the wealthy to fund social programs, was seen as being put to a test through these endorsements.
Two other democratic socialist candidates, both endorsed by Mamdani, also won their primary contests. Assemblywoman Claire Valdez unseated Brooklyn Borough President Antonio Reynoso in the 7th district. Additionally, Darializa Avila Chevalier, a doctoral student active in pro-Palestinian protests at Columbia University, won her race in New York's 13th district. Chevalier defeated Adriano Espaillat, who had held the seat for five terms and chaired the Congressional Hispanic Caucus. Mamdani lauded Chevalier as an individual "of clarity, of conscience and of conviction."
These election results are being viewed as a significant boost for the left wing of the Democratic party in New York City. However, some establishment Democrats have expressed concerns that progressive candidates may not resonate with swing voters in the upcoming general elections.