The U.S. Constitution should be amended to allow no one to be elected president.
That doesn't take an amendment. That just takes a literalist interpretation. "No Person except a natural born Citizen, or a Citizen of the United States, at the time of the Adoption of this Constitution, shall be eligible to the Office of President" There. You have to be, at the time of the Adoption of this Constitution, either a natural born Citizen (of any country), or a Citizen of the United States. Nobody alive today fulfills that requirement.