The Big Apple is about to take on a new name -- Tent City, or Filth City. Or perhaps Lepto City, after leptospirosis, a bacterial infection increasingly found in homeless encampments. New York's new mayor, Zohran Mamdani, is barring the New York Police Department from closing down encampments. Since Mamdani previewed his policy in December, new encampments are emerging in many neighborhoods. The consequences are dire both for vagrants and for the city's viability. Between Friday, when the city was hit with a bone-chilling winter storm, and Sunday night, eight people were found dead outdoors, suggesting they were homeless. Mamdani...