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.

Constitutional scholar Randy Barnett calls Biden's autopen use "the biggest constitutional scandal in US history" as questions arise about the legality of presidential actions.

The House Oversight Committee’s investigation into the use of the autopen during former President Joe Biden’s administration is ramping up, with the panel slated to conduct several more interviews in the coming weeks.