As Craig Unger's new investigative report makes clear, Russian mob money financed Trump's business for years. Unger makes clear that he can find no evidence that Trump was ever involved in criminal activity, or knew exactly where the money pouring into his buildings was coming from. He didn’t need to know or want to; if nothing else Trump has finely honed survival instincts. But Unger also documents that criminals and oligarchs lived in and ran illegal activities out of Trump properties, including Trump Tower in Manhattan, for more than 30 years.