The first 'Dossiers' were started during the bloodbath that was the French Revolution. The state wanted to know everything about everyone. Im guessing everyone in the US has a decent size electronic dossier stored somewhere.
Mafiosos would have run all over him the first day he opened the Casino. Hed have to get involved in all types of shady shit or let stuff go on under his nose. Trump is a fucking genius. Why bother with mall cops when FBI can do security and keep the place clean.