House Oversight Committee Chairman James Comer (R-KY) issued a subpoena Tuesday to former White House deputy chief of staff Annie Tomasini as part of an escalating investigation into former President Joe Biden’s mental fitness and final clemency decisions while in office.

The Kentucky Republican heading up the investigation into former President Joe Biden's use of the "autopen" to sign documents sent out his own correspondence related to the probe that was "signed" digitally,

The House Oversight Committee is probing whether former President Biden's top aides covered up signs of mental decline.

Rep. James Comer (R-KY) expressed his outrage at Dr. Kevin O'Connor, former President Biden's physician, for pleading the Fifth at a closed-door hearing on the former president's decline. REP. JAMES COMER (R-KY): Dr.

Rep. James Comer (R-KY) speaks to reporters after taking the closed-door testimony of Biden-era White House physician Dr. Kevin O'Connor.

House Oversight Committee Chairman James Comer on Tuesday subpoenaed Joe Biden's deputy chief of staff when Biden was president. The committee had requested the former White House official, Annie Tomasini, to appear for a deposition on Friday.

Ky., elaborates on former President Joe Biden’s doctor’s testimony before the House Oversight Committee on ‘Jesse Watters Primetime.’