 A Parkinson's disease expert has paid a visit to the White House on numerous occasions over the past year, raising more questions about President Biden's fitness for office. The White House press secretary says a neurologist has examined Mr. Biden several times as part of his annual physicals, and no issues were found. Meanwhile, House Republicans want to talk with the president's personal physician. House Oversight Committee Chair James Comer, Kentucky, sent a letter to White House physician Kevin O'Connor, requesting that he appear behind closed doors