What about the 25th amendment? It seems fitting... but forget it. It is practically impossible -

Section 4: Vice Presidential and Cabinet Declaration of Presidential Inability

Scenario: If the President is unable or unwilling to declare their inability.

Procedure:

The Vice President and a majority of the principal officers of the executive departments (the Cabinet) transmit a written declaration to the President pro tempore of the Senate and the Speaker of the House of Representatives, stating that the President is unable to discharge the powers and duties of the office.

The Vice President immediately assumes the role of Acting President.

If the President disputes this declaration, they can send a written declaration to the President pro tempore of the Senate and the Speaker of the House of Representatives stating that no inability exists and that they are able to resume their duties.

If the Vice President and a majority of the Cabinet still believe the President is unable to discharge the duties of the office, they have four days to transmit another declaration to the President pro tempore of the Senate and the Speaker of the House of Representatives.

Congress must assemble within 48 hours if not in session and decide the issue within 21 days. If two-thirds of both Houses vote that the President is unable to discharge the powers and duties of the office, the Vice President continues as Acting President. If not, the President resumes their duties.