Trump tries to void Biden's pardons, blaming autopen. Many presidents have used it

The Autopen Model 80 in 2011. President Trump is accusing Biden of using an autopen to sign documents, as many presidents have over the years.

Trump claims without evidence that Biden's Jan. 6 panel pardons are void because he allegedly used an autopen. Autopens have been popular with presidents for decades. Here's what to know about them.

(Image credit: Manuel Balce Ceneta)