Former President Joe Biden’s doctor appeared Wednesday before a House panel investigating the extent to which Biden’s decline was masked from the American people, but he refused to answer questions, according to the panel’s chairman.

Former President Joe Biden’s personal physician Dr. Kevin O’Connor pleaded the Fifth Amendment in a closed-door congressional deposition Wednesday as part of a GOP investigation into Biden’s mental acuity while in office.

Former President Joe Biden and his aides are the subject of an ongoing investigation, after Trump accused the latter of concealing Biden’s “serious cognitive decline” and abusing the power of Presidential signatures.

Dr. Kevin O'Connor, former President Joe Biden's physician, is appearing before the House Oversight Committee on Wednesday for a closed-door, transcribed interview. O'Connor was subpoenaed by Committee Chairman James Comer as part of a Republican-led investigation into Biden's mental fitness and use of a presidential autopen while in office.

Sometimes it was thirty-six hours. Other times it was seventy hours. Or maybe it was ninety-some hours,” write the authors of “2024: How Trump Retook the White House and the Democrats Lost

The book "2024" was written by three Washington Post reporters who covered the 2024 campaign for the White House.