Former President Donald Trump vowed to change the 25th Amendment to allow for the removal of the vice president if they hide the “incapacity of the president.”

During a Saturday rally in Mosinee, Wisconsin, Trump offered a new proposal to modify the 25th Amendment. Trump and his supporters have often attacked Joe Biden by alleging he is mentally unfit to serve as president while claiming Kamala Harris has hid this fact from the public.

The 25th Amendment in the U.S. Constitution is designed to set up a line of succession if the president dies or becomes incapacitated. It allows the vice president to become president if the president dies, resigns, or is removed from office by impeachment.