If you want to know how Trump negotiates, read this excerpt from The Art of The Deal (1987) about Trump preventing a woman's farm from foreclosure:
"I explained that I was a businessman from New York, and that I was interested in helping Mrs. Hill. He told me he was sorry, but that it was too late. They were going to auction off the farm...
That really got me going.
I said to the guy: 'You listen to me. If you do foreclose, 'I’ll personally bring a lawsuit for murder against you and your bank, on the grounds that you harassed Mrs. Hill’s husband to his death!'
All of a sudden the bank officer sounded very nervous and said he’d get right back to me.
Sometimes it pays to be a little wild."
- Donald J. Trump, The Art of The Deal