CHICAGO —The Democratic Socialists of America sent a clear message to Democrats during its biennial convention: We're in charge now. Zohran Mamdani's surprise win wasn't an anomaly, delegates said, but rather the start of the DSA's rise to power over the Democratic Party. Roughly 1,200 DSA members gathered over the weekend at McCormick Place, Chicago's convention center, to solidify the party's platform. Tickets for the three-day convention, attended by the Washington Free Beacon , cost $225