Is this one what they are probably thinking of doing:
Section 4: Vice Presidential–Cabinet declaration[change | change source]
Section 4 is the only part of the Amendment that has never been used.
[21] It allows other executive officials to declare the President unable to do his job. The Vice President must agree to do this. So must:
[19]
- A majority of "the principal officers of the executive departments" (the United States Cabinet), OR
- "Such other body as Congress may by law provide" (some other group that Congress chooses)
To declare the President unable to do his job, these people would have to sign and give a letter to the President pro tempore of the Senate and the Speaker of the House. As with Section 3, the Vice President would then become the Acting President.
[19]
The President may take back the Presidency by sending a letter to the President pro tempore and the Speaker of the House. However, if the Vice President and the Cabinet think the President is still disabled and still cannot do his job, they can challenge his return. They have four days to write another declaration saying the President is still unable to do his job. The Vice President is still Acting President during these four days. Congress then has to get together within 48 hours, if they are not already in session. Then Congress has 21 days to make a decision. In the meantime, the Vice President is still Acting President.
[19]
If two-thirds of each House of Congress votes that the President still cannot do his job, the Vice President would continue to be Acting President. If Congress does not vote this way, or if they do not vote at all within 21 days, the President takes over the Presidency again.
[19]