Well, I think it is a safe bet that a test would show that potato has a problem utilizing even the best enhancing meds. In 2016, he almost approached lucidity. He has only declined from there. And he will not debate Trump because Trump, on his worst day with a cold and a gut full of meds would still wipe the floor with Pedo Joe.
Joe's handlers know that, too.
"You know...the thing... a nine millimeter will blow a lung right out of the body. If you can't decide if you should vote for me, you ain't black."
(Said to a black man during an interview. Said black man so staunchly democrat that, like Obama, he ignored Pedo Joe's blatant racism.)