In a significant political shift, NYC Mayor Zohran Mamdani has endorsed Darializa Avila Chevalier, a challenger backed by the Democratic Socialists of America, in the NY-13 congressional race against incumbent Rep. Adriano Espaillat. This endorsement comes amidst tensions within the Democratic Party, as Mamdani previously vowed to support Espaillat. Avila Chevalier is positioning herself as a progressive alternative, opposing establishment Democrats, and has garnered support from local DSA canvassers who believe she can win. Meanwhile, questions have arisen regarding the past conduct of a former Mamdani campaign leader, who has been criticized for racist remarks against white women.