"He's a malignant narcissist. Anything which doesn't affirm his grandiosity and his omnipotence, because his grandiosity has gotten to almost psychotic degrees at this point, is a mortal threat," Gartner told the podcast. "So the fact that he's perpetually being bombarded by waves and waves of these threats, it is going to take a toll."
We Can See Trump Is in Gross Decline: Psychologist Dr. John Gartner
https://www.thedailybeast.com/we-can-see-trump-is-in-gross-decline-psychologist/