Here is the 'tell' about how Trump does business - the speakers at the GOP convention. Cruz aside, it was a non-stop love fest for Trump but did anyone notice that there was not one single business partner of Trump's on stage? Employees and children, yes. But not one concrete or steel or drywall contractor that has worked with him over the years stood up for him at the convention. Not one earth mover or plumbing contractor has stood up for him. There were two categories of business people on that stage - those that work for Trump and those that have never worked with him. Telling, that.
I've said it time and again - Trump is a scorched earth negotiator. He'll fight dirty and hard for every deal point. It's a valid strategy but not one that gets a second deal with the same party. Nobody wants to do business with him twice.