President Donald Trump shared a conspiracy theory that claims Jan. 6 investigation committee pardons are void because Biden used autopen.

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.

Trump claimed an autopen was used to sign Biden’s preemptive pardons of the January 6 committee without his knowledge, making them invalid.