Does Obama have Parkinson's

"...didn’t KD have a theory about Parkinson’s or something?"

Yes.

This post by KD from Jan/2011 provided an interesting clue:

"Back in 2004-2005, before he ran for president, when he’d just moved into the Obama/Rezko Mansion, a friend of mine had a meeting with Obama in his study — where piles of papers on Parkinson’s Disease were stacked. Books on Parkinson’s sat on his desk, with printed pages from websites scattered around. Obama is an intellectually incurious man who has never shown the slightest interest in any topic involving anything but himself. … Which is why all of that reading material on Parkinson’s is so strange. "

The reasoning here regarding O's ego seems good! :/