Section four of the Twenty-Fifth Amendment specifies a process by which the vice president, with a majority of cabinet officers, may relieve the president of the “powers and duties” of the office and assume them himself as “acting president.” If this occurs, the president may then recover those powers and duties by notifying the same members of Congress as the vice president notified in removing them. If the difference of opinion about the president’s fitness persists — if the president and vice president continue to disagree on the president’s fitness — then Congress has to decide, with a two-thirds majority…