President Donald Trump suggested Monday that the legality of autopen-signed pardons should be decided by the courts, questioning whether former President Joe Biden’s final clemency orders, including controversial preemptive pardons,

Trump says the committee members are guilty of “major crimes,” but hasn’t spelled out any laws he believes they violated.

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.