WASHINGTON — Sen. John Fetterman (D-Pa.) is eviscerating his fellow Democrats for defending the “mess” of Graham Platner’s candidacy in Maine following mounting allegations of sexual misconduct . “Every Democrat knows P-Hustle has Nazi ink, was Captain D–k-Pic on Kik, abusive towards women and slandered American soldiers online,” Fetterman told The Post Friday. Members of his party are choosing instead “to suppress their gag reflex for the ‘greater good,'” he added, noting Platner’s upcoming