Oversight Committee Chair James Comer, R-Ky., is investigating allegations that Biden's former top White House aides covered up signs of his mental and physical decline while in office, and whether any executive actions were commissioned via autopen without the president's full knowledge. Biden allies have pushed back on those claims.

President Joe Biden’s former White House physician refused on Wednesday to answer questions as part of the House Republican investigation into Biden’s health in office. Dr. Kevin O’Connor invoked his rights under the Fifth Amendment during a closed-door interview with the House Oversight Committee,