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 doctor’s uncooperativeness in a House probe looking into the former president’s fitness to serve has led the Republican congressman overseeing the investigation to allege a “coverup” of Biden’s “cognitive decline.”

The House Oversight Committee completed another deposition of a former Biden aide in its investigation into allegations of a cover-up of the former president's mental acuity.