The filmmaker, who has made biopics of Richard Nixon and George W Bush, told The Sunday Times that he is intrigued by Trump as a character.
“He doesn’t sleep a lot,” Stone said. “He doesn’t take good care of his health. Don’t you think there’s some pile-up, if you don’t sleep for several years like this?
“There’s nothing that could quite capture this fellow. He’s quite a whirlwind, a fascinating dramatic character. Shakespearean too, in the sense that he’s so emotional – at times he creates a storm, almost purposely every day, to keep the energy going. He creates a storm inside himself. He’s King Lear in a strange way too - which daughter loves me more?”
Stone also suggested that Trump’s behaviour is appealing to a broad swath of the United States.
“We have a law-and-order candidate in Mr Trump,” Stone explained. “He talks like a fool, but he talks like many people – more military, more power, more application of force, more violence.”
Stone, whose last film was inspired by Edward Snowden, is releasing a memoir on 21 July.
Titled Chasing the Light, it covers his life from his birth until 1986, when he turned 40 and directed the Vietnam movie Platoon.