“He crafted that approach, it’s one he owns,” Goldberg said. “He has a tendency to argue, and if he is not satisfied he will leave the room, disappear, doesn’t come back and the people are on edge wondering where he is. And then when he feels it is the appropriate time he comes back.”

Goldberg said that Trump once attended a protracted meeting to reach a divorce settlement with his first wife, Ivana Trump. After hours of talks, he disagreed with the amount of alimony she wanted, and the two sides couldn’t agree. So Trump stood up and left.

“Everyone was looking for him because without his presence a deal couldn’t be done and he was gone for two hours and we didn’t know where he was,” Goldberg said. “When he came back, the other side was so concerned if they didn’t make a deal he would walk away again.”