The use of the autopen, a device that reproduces signatures and is ubiquitous in government and business, is ordinarily uncontroversial. There is no power to undo a pardon in the Constitution or case law.

A report by a hard-right group alleges Biden signed several last-minute pardons using an automated device, leading Trump to claim they are “void.”

O n Monday, President Donald Trump signaled that he intends to nullify the presidential pardons—issued to those on the House Jan. 6 committee that investigated Trump—executed by President Joe Biden because, he said, they were signed via autopen.