Trump may well take Michigan; Michigan has a LOTTA Nazis, the Nazis Party there is crooked as fuck, and the Dem candidate for President is currently backing a genocide that's DEEPLY unpopular with Muslim Americans in and around the major urban centers in Michigan - but there is no scenario whatsoever where Trump WINS or does well in Detroit
Talking about Detroit is a dogwhistle for Trump, that mobilizes the cracker suburban Nazis he needs to win the state. It has nothing to do with the D itself