New York City Mayor Zohran Mamdani revives a local “mayoral pool jump” tradition by taking a ceremonial plunge into the Thomas Jefferson Pool in East Harlem. In a video shared by outlets, Mamdani enters the pool in formal attire, described in reporting as a suit-and-tie outfit and as a three-piece dress suit. The act is presented as the start of the city’s summer swimming season. Coverage also ties the event to the tradition’s history: the pool jump has been described as a decade-old ceremony connected to efforts by previous city leadership, including Mayor Fiorello LaGuardia, who is credited with initiating public swimming traditions. By jumping into the pool, Mamdani marks the continuation of the practice and highlights the significance of public swimming in New York City, including a reference to 90 years of public swimming. The reports emphasize the ceremonial nature of the jump and the mayor’s attire rather than any broader policy announcements or incident details.