[Pontiac]

Whenever the Vice President and a majority of either the principal officers of the executive departments or of such other body as Congress may by law provide, transmit to the President pro tempore of the Senate and the Speaker of the House of Representatives their written declaration that the President is unable to discharge the powers and duties of his office

We can safely assume that the no one in the executive branch is going to declare Obama incapacitated.

That leaves congress having previously passed legislation setting up a body specifically for the purpose of declaring the president incapacitated. We know Obama is not going to sign legislation setting up such a body now.

So has the congress at some time in the past set up such a body? Does some such law exist?

[SunLakesJeff]

Does some such law exist?

Few Constitutional "outs". Convention of States is a Last Resort.