I think she has PD. Third hand accounts, wikileaks, and public videos suggest this, IMO. But that is not really important. Do you know any "healthy" people that have her health problems? Donna Brazile was looking to replace her after the 9-11 event according to her book. By then, they had to know of her ongoing health problems. The press covered it all up. I remember after the 9-11 collapse, Hillary managed to make it up a flight of stairs to her plane a few days later. Wolf Blitzer sounded like she had just won the Superbowl.
I don't know of PD meds that enable stairs, especially dowm. But late stage PD doesn't respond to meds other than dopamine replacement and that doesn't allow people to walk up and down stairs. Any PD patient who can handle stairs will probably die of something else (or complications from a fall) 20 years later.