I think he was/is a cocaine abuser/user.
Years ago, I read stories of how he was a frequent attendee at coke parties thrown in Little Rock hotels by the local druggies.
I think his doctor was covering up his blood tests which would show coke in his system.
I don’t think that a former cok-sniffing Democrat would suffer at the polls as the MSM would cover up or dismiss it out of hand. Obama has admitted drug use and was elected. But look at how Thomas Eagleton was dropped like a hot potato.