 This is CBS News on the Hour, sponsored by O'Reilly Auto Parts. I'm Christopher Cruz. There were tense exchanges in the White House briefing room over reports that a doctor who specializes in Parkinson's disease had been in the White House on multiple occasions. CBS's Ed O'Keefe sparred with White House Press Secretary Karine Jean-Pierre. The White House facing repeated questions about President Biden's medical history. Has the president been treated for Parkinson's? No. Is he being treated for Parkinson's? No.