It’s rumored he also had connections to the Russian mob and there was a book operation run of Trump Tower that got busted some years back if I recall correctly.
Russian mafia expert Mark Galeotti says it's all about greed. "I have seen no serious evidence of any explicit link between Trump and Russian mobsters. Rather, what I have seen is evidence of the extent to which the Trump Organization seems to have been willing to engage with dubious investors and buyers—some Russian, many not—whom more reputable corporations would not have touched," Galeotti told Vice.
