Yes, I believe you may be on to something. Not to repeat myself, but did you see her with Gore today? The excerpt on Cavuto 3 PM show, I record. As Gore spoke, caww, Hillary nodded in the affirmative for FIVE FULL MINUTES, non stop, but for three pauses lasting but a second, two seconds at most, then back to nodding.
It was abnormal. Especially against the back drop of a bleacher audience who were NOT nodding.
This was such a huge news day it may not attract attention, but it should because it would bring back the issues of her condition. Nuts, or Parkinson, or neurological-disorder.
She head bobs to the point of distraction. She stifles it on purpose in high visibility situations, for example, debate.