The House Oversight Committee’s first closed-door, transcribed meeting investigating former President Joe Biden's mental acuity began Tuesday with former White House Domestic Policy Council Director Neera Tanden appearing for questioning on Capitol Hill.

A top former aide to former President Joe Biden testified behind closed doors Tuesday as part of the House Oversight Committee’s investigation into his mental fitness to serve and his White House’s use of an autopen,

Dr. Kevin O’Connor agreed to a transcribed interview after he was the target of a subpoena from House Oversight Committee Chair James Comer, R-Ky.