(Dear mods: Politics disclaimer, responding to a mob related question)
Trump knowingly worked with mobsters to his own advantage. He bought mob cement from Castellano and Fat Tony (as a front for Chin, we now know) to bypass union labor. A quick google search will tell you more. There have been entire books and extensive news articles written about it. So, unfair to lump Cus D'Amato into the same lot. As far as anyone knows, Cus never knowingly worked with the mafia. There was a time when the mafia ran boxing and he had no choice but to bite the bar on some extortion rackets, but as far as anyone knows he never deliberately gamed that system.