Trump Inc. dealt with foreigner corporations. U.S. business's knew better.
Two of Trump Inc''s biggest associates/customers were Russian Oligachs and Saudi Arabians (and the banks that laundered the money).
I really don't know if any legitimate businesses dealt with him. He was well known to stiff his contractors, screw his "partners," and lie about,, ... well, ... just about everything.
Overall, virtually everything Trump touched turned to shit. How could any businessman man in the world screw up a casino? Well, Trump's Atlantic City Casino went bankrupt. (That's like loosing a horse race with one horse in it.)
Given his position and opportunities, he could have been one of the richest men in the world. But his focus was always on "the scam." After all, why earn it when you can get fools to just give it to you?
I doubt if there was any legitimate businessman in America who didn't know who and what Donald Trump was and is..
Conversely, many around the world, who didn't do their homework, ended up lining Trump's pockets and losing millions.
This was our last president who wants to be our next one. It's incredible how many millions of voters are buying the same shit he's selling and has always sold.