Sept. 2 (UPI) -- New York City's ex-Mayor Bill de Blasio on Tuesday endorsed state Assemblyman Zohran Mamdani in the hotly contested race to be the 111th mayor of America's biggest city. De Blasio officially swung his public support behind the Democratic socialist and mayoral nominee from Queens in a media blitz with an op-ed and television appearance. He called Mamdani a "particularly perceptive, intelligent" and an "old soul" whose campaign is focused on "kitchen-table issues" affecting