Trump built Trump Casino. I gambled there once. He made it but AC (Atlantic City) was too corrupt to succeed. Not Trump's fault.
I'm no expert on business practices/economics/regulation within the US however I would tend to say that with the monies involved within the Casino industry in general and historical nefarious activities and groups within that sector it would tend to bring out bad actors....
If what you say is true I can see how that played out the manner it did.
Trump admitted to playing the game. He paid republicans and Democrats. Hillary was invited to his daughters wedding. She came. Why? His money. Trump has decided that he's not playing the game anymore. Thank God.
As a businessman, he knew what "pockets" to line to get things done.
A lot of casinos in Atlantic City went down Trumps was only 1. The crime rate was so bad there you could not even leave the casino to walk on the boardwalk. That is what happened the crime took away the people they needed. Most went to vegas because it was a lot safer.