25th Amendment, Section 4 Explained. - 7/7/24

"Here's the simplified process:

1. Vice president believes the president can no longer carry out the duties of his office.

2. A majority of the 15 cabinet members agree.

3. The VP and the cabinet write a letter stating their beliefs, the president loses power, and the VP becomes acting president.

4. If the president disagrees, he writes his own letter and regains power.

5. If the VP and cabinet still believe the president is unfit for duty, they have four days to send another letter. As soon as this letter is sent, the president again loses power, and the VP again becomes acting president.

6. Congress has 21 days to vote on the president's ability to carry out the duties of the office. If at least two-thirds of both the Senate and House agree he's unfit, the president permanently loses power, and the VP continues to be acting president. If less than two-thirds agree, the president again regains power."

https://blog.prepscholar.com/what-is-the-25th-amendment-simplified#section-4