 Chris Fox for CBS News, Austin. A doctor specializing in Parkinson's disease has recently visited the White House multiple times, in fact. CBS's Ed O'Keefe had a testy exchange with White House Press Secretary Karine Jean-Pierre about the visits by neurologist Dr. Kevin Kennard. Dr. Kennard's name appears on the public White House visitor logs that show that he's been here eight times. So when she suggested there's a security concern for explaining why he was here, that is where we got frustrated.