Mayor Zohran Mamdani continued to push for a radical Democrat running for Congress who once called the US “a f–ing disgrace,” describing her Saturday as a “perfect candidate.” Mamdani used the media scrum at early voting booths at the Metropolitan Museum of Art on the Upper East Side ahead of Tuesday’s primaries to gush about Democratic Socialist of America insurgent Darializa Avila Chevalier. Mamdani is backing Avila Chevalier, 32, over Harlem-based Rep. Adriano Espaillat in the primary for