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.

Ky., used a digital signature to send letters and subpoena notices related to the Biden autopen investigation.

Comer using an autopen to investigate an autopen is just so James," one House Democrat said, mocking the Oversight Committee chairman.

Welcome to the Fox News Politics newsletter, with the latest updates on the Trump administration, Capitol Hill and more Fox News politics content.

Joe Biden said every pardon and commutation he issued was his decision, calling Republican "liars" for alleging his aides illegally used an autopen.

Sixteen letters bearing Comer’s signature were sent to Biden White House officials requesting transcribed interviews. In all 16 cases, Comer’s signature was digitally inserted, and the metadata shows an oversight committee staffer actually authored the documents.

President Donald Trump has claimed that the thousands of pardons signed during the Biden administration are void, due to alleged autopen usage.

Lead Republican investigating Biden’s use of the autopen frequently uses autopen - Lawmakers frequently use digital signatures, akin to the autopen, on correspondences