. >> russell bufalino mentioned jimmy hoffa.e developed his own connections with the detroit family which bufalino was close to, too. eric: hoffa with us elected president of the international union of teamsters. >> he used the influence of his union to throw favors to gangsters to in turn solved problems for him. eric: it turns out working with gangsters was profitable. >> all of his deal weather underworld brought about the congressional and federal investigations that ultimately proved his undoing. eric: on capitol hill the senate committee targeted mobsters and their ties to labor leaders. future president john f. kennedy and his brother robert targeted hoffa. >> robert kennedy and hoffa despised each other. >> if you say that s.o.b., i'll break his back. >> who? >> to anyone, did you make that statement? >> despite facing multiple indictments, and facing jail time he was overwhelmingly elected teamsters president. when he headed to miami for the 1957 convention, he was greeted as a hero. putting hoffa behind bars was so imp