“The ‘Pardons’ that Sleepy Joe Biden gave to the Unselect Committee of Political Thugs, and many others, are hereby declared VOID, VACANT, AND OF NO FURTHER FORCE OR EFFECT, because of the fact that they were done by Autopen,” Trump wrote on Truth Social.

"It could open a Pandora's box if a sitting president tried to undo a pardon by one of their predecessors," one expert told ABC News.