washington new york city mayor bill de blasio warn republican presidential candidate donald trump thursday embrace stop frisk police tactic say would worsen relations police community country trump praise anti-crime tactic police stop question search pedestrians weapons contraband say fox news thursday massively change crime statistics new york city stop frisk work trump say fox friends thursday say crime-ridden city chicago need adopt tactic de blasio reject claim attribute sharp drop crime another strategy adopt bill bratton city longtime police commissioner retire less week ago bratton champion break windows police strategy emphasize pursuit crimes matter minor resignation letter attribute decline crime new york city nation large 8.5 million people additional officer emphasis build bond within neighborhoods donald trump talk stop frisk like know facts de blasio say interview cnn experience police experience public safety really careful reinstitute stop frisk country would see lot tension police community police tactics deadly encounter african-americans many unarm spark protest unrest across country state emergency declare charlotte north carolina second night unrest spark fatal police shoot black man also protest tulsa oklahoma recent days demand arrest police officer see video last week fatally shoot unarm black man hand clear view time stop frisk policy gain traction new york city mayor rudy giuliani top trump supporter de blasio promise end practice 2013 mayoral campaign de blasio also credit continue drop crime new york city recent decades crime reduction strategy adopt bratton call compstat adopt statistical strategies achieve effective police change things new york city de blasio say add crime go three years since administration curtail use stop frisk fix ninth paragraph say protesters demand arrest officer arrest nyc mayor warn trump 'stop frisk make things bad