President Donald Trump first focused on Joe Biden’s use of the autopen in March, leaning into the idea that the former president’s use of the tool to sign documents showed that he wasn’t in charge while in the White House and that his actions were “null and void.

The Justice Department under Democratic and Republican administrations has recognized the use of an autopen to sign legislation and issue pardons for decades. Trump presented no evidence that Biden was unaware of the actions taken in his name, and the president’s absolute pardon power is enshrined in the U.S. Constitution.