All three candidates that had New York Mayor Zohran Mamdani’s backing won Tuesday’s Democratic congressional primaries for the U.S. House, marking a victory for the democratic socialist movement over the party establishment. Bucking Democratic leaders, Mamdani endorsed Brad Lander, Claire Valdez, and Darializa Avila Chevalier in three competitive House primaries in New York City. All three candidates’ campaigns were characterized by progressive economic policies and criticisms of U.S. military