Barrack, in interviews with The Washington Post, said he has been “shocked” and “stunned” by some of the president’s rhetoric and inflammatory tweets. He disagrees with some of Trump’s proposals, including his efforts to ban immigrants from certain Muslim countries and his push for a border wall with Mexico. He wonders why his longtime friend spends so much of his time appealing to the fringes of American politics.

“He thinks he has to be loyal to his base,” Barrack said. “I keep on saying, ‘But who is your base? You don’t have a natural base. Your base now is the world and America, so you have all these constituencies; show them who you really are.’ In my opinion, he’s better than this.”

“I tell him all the time: I don’t like the rhetoric,” Barrack, who runs a large real estate investment company, said at his Manhattan office.