Joe Biden's physician refused to answer questions during a closed-door deposition in House Republicans' probe of his mental acuity as president.

Kevin O’Connor cited both physician-patient privilege and his Fifth Amendment right against self-incrimination in refusing to answer questions from the House Oversight Committee.

Kevin O'Connor cited doctor-patient confidentiality and his Fifth Amendment right against self-incrimination in deciding not to answer questions from Republicans on the House Oversight Committee.