SAN JUAN, Puerto Rico — The TaxMam cometh. Mayor-elect Zohran Mamdani was spotted rubbing elbows in Puerto Rico on Friday with state legislative leaders, who hailed him as the “man of the hour” — as the Democratic socialist took jabs at President Trump and doubled down on his pledge to take on his “authoritarian” administration. Assembly Speaker Carl Heastie and Senate Majority Leader Andrea Stewart-Cousins hosted a reception during the annual SOMOS conference, where Mamdani was among those