She hired investigators to track her opponent
FIRST UP: Mayor Zohran Mamdani’s commitment to back Rep. Adriano Espaillat was initially so ironclad they shook hands on it last summer. But Mamdani broke that promise last week when he endorsed Espaillat’s primary opponent, democratic socialist Darializa Avila Chevalier — and the fallout is mounting. Rep. Nydia Velázquez, an early supporter of Mamdani’s 2025…