Former President Joe Biden's physician, Dr. Kevin O'Connor, refused to answer questions to the House Oversight Committee today, citing the Fifth Amendment and doctor-patient confidentiality. Why it matters: The committee is investigating Biden's decline while in office,

Joe Biden’s White House physician on Wednesday declined to answer questions during a closed-door deposition with the House Oversight Committee, invoking his Fifth Amendment right as the Republican-led panel pushes forward in its probe of the former president’s mental fitness and decline.