Lanier, who met Trump a couple of times back in the real estate developer’s New York heyday, thinks the president’s addiction to tweeting is rewiring his brain in a negative way. As Trump picks up speed on Twitter, the Oval Office is becoming a Skinner box. Like other “behavior modification empires,” as Lanier calls social media sites, Twitter offers positive reinforcement for negativity.

“Twitter addicts take on this kind of nervous, paranoid, cranky quality, sort of itching for a fight,” Lanier said in an interview. “Trump used to be in on his own joke, and he no longer is. He’s just striking out every morning, fishing for somebody to harass or seeing who’s harassing him.

“I do think it creates a terrifying situation because somebody who is addicted is easy to manipulate. It’s easier for the North Koreans to lie to him than if he wasn’t an addict.”