Shaun Mullen follows the money trail. A snippet:
Beginning in 1984, over 30 years before he ran for president, Trump began tapping into what would become an extensive network of contacts with corrupt businessmen, mobsters and money launderers from the former Soviet Union, Russia and their satellite states to make deals ranging from real-estate sales to beauty pageants sponsorships to bailing out his frequently ailing enterprises.
It is tempting to say that Trump built that network himself as his business empire grew, but in reality members of the network more often used him as a convenient patsy. This has been especially true of money launderers.