 Go ahead, announce the president. Challenge me at the convention. He also sent a two-page letter to congressional Democrats, insisting it's time for this debate over his health to end. Has the president been treated for Parkinson's? No. Is he being treated for Parkinson's? No, he's not. Is he taking medication for Parkinson's? No. White House officials initially declined to say Monday why Dr. Kevin Kennard, a neurologist and Parkinson's specialist, had visited the White House eight times in eight months.