http://www.salon.com/2017/05/23/is-donald-trumps-casino-empire-linked-to-money-laundering-past-financial-crimes-may-be-the-presidents-biggest-problem/
"Casinos are an obvious choice for money launderers. So is real estate, for that matter. And Trump has been closely associated for years with the kind of people who dabble in such behavior, including Russian mobsters."