RFK's dealings with mob types, CIA and the ongoing use of both in the numerous plots to kill Castro did them both in. He backstabbed all of them. He initially did not want to use mob operatives in his Cuban operations but he quickly became involved. Playing both sides against the middle. All at the same time going after Hoffa and other mobsters. Let's not forget the mob helped fix the election in Illinios and Nixon never demanded a recount. Probably because he did not want to be the first guy to do this in a presidential election. Maybe he also feared Kennedy use of mob types and possible mob retribution. Who knows. You can't play both sides against the middle with people like this and emerge unharmed.