 I will say when the president gets knocked down, he gets back up. This is quintessential Joe Biden. On Capitol Hill, Mitchell Miller, WTOP News. President Biden's doctor is this morning clarifying an important issue here. A Parkinson's disease expert visiting the White House eight times, we're told, over an eight-month span between last July and March of this year. But the president's doctor says this specialist was there to see other patients and not Mr. Biden.