House Republicans are weighing how to proceed after Dr. Kevin O’Connor, former President Joe Biden’s White House physician, invoked his Fifth Amendment rights and refused to answer questions Wednesday in a closed-door interview with congressional investigators.

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.