Photo-Illustration: Vulture; Photos: Taylor Hill/FilmMagic, Michael M. Santiago/Getty Images If there’s one big downside to running on, say, an anti-billionaire platform, as New York City mayor Zohran Mamdani did last year to great success, it’s that you’ll probably wind up excluding yourself from the invite lists of any forthcoming billionaire weddings , including that of the unofficial First Lady of the Big Apple, Taylor Swift. In a conversation with reporters on June 15, Mamdani seemed to