Nobody said he wasn’t.

I’m not even really talking about Trump per se - he’s just the inspiration. Reading the linked story, and with all of the past similarly insane things he’s said and done, it struck me that he almost doesn’t even exist as a person. Rather, he’s more like just a vehicle for his ego (and, now that you mention it, for his lusts and his delusions). As if, where other people have thoughts and ideas and beliefs, he just has the incessant yammering of his ego (etc.).

And then that in turn got me to wondering if that was part of the origin of myths of demonic possession - if people more or less like him in the past were seen by others the same basic way that I see him - as if whatever personality he should have had has been pushed aside by his overwhelming ego (etc.).

Or in their more primitive interpretation, by a demon.