House Oversight Chairman Comer subpoenas former Biden deputy chief of staff

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.

Tomasini appeared for a transcribed interview in May, and her legal counsel has confirmed her voluntary appearance for July 18, according to the subpoena. However, on Monday, her lawyers requested a subpoena to compel her appearance on July 18.

"The Committee seeks information about your assessment of and relationship with former President Biden to explore whether the time has come for Congress to revisit potential legislation to address the oversight of presidents’ fitness to serve pursuant to its authority under Section 4 of the Twenty-Fifth Amendment, or to propose changes to the Twenty-Fifth Amendment itself," the subpoena reads.

The committee is investigating Biden's mental acuity while he was in office, as well as his use of an autopen for pardons and commutations.