@newsguyusa is it time yet?
Section 4 is the most controversial part of the 25th Amendment: It allows the vice president and either the Cabinet or a body approved “by law” formed by Congress, to jointly agree that “the President is unable to discharge the powers and duties of his office.” In theory, this clause was designed to deal with a situation where an incapacitated president couldn’t tell Congress that the vice president needed to act as president. Senator Birch Bayh, who played a critical role in championing the 25th Amendment, explained Section 4 was designed to deal with “an impairment of the President’s faculties, meaning that he is unable either to make or communicate his decisions as to his own competency to execute the powers and duties of his office.”
https://constitutioncenter.org/blog/understanding-presidential-disability-under-the-constitution