Actually, Meth makes more sense than anything else except for the tell tale signs of the eyes.
Not saying she has Parkinson’s but in some ways it is starting to fit. Remember Michael J Fox and a bunch of folks got it at an early age and it was felt to be related to Cocaine use in the 70s and 80s. Some contaminant or excessive use, etc. Hillary and her friends were “in” with that crowd. Her grandiosity and paranoia do fit with that sort of business. Hmmmm....