State of the Union Address: the “designated successor,” this stranger who would become president in the event of a disaster. In the American Constitution, the length of the presidential term - four years - is set in stone.
Calling emergency elections being unthinkable, a successor must be able to be designated in all cases, including the most improbable, to complete the presidential mandate. Most of the time, the president appoints a second-rank personality, who are never in charge of the most important issues.