Would Pelosi have used it on Trump (with two bogus impeachments)? If Yes, then the Republicans should have NOTHING to do with this bill.
Removal of the president over his objection by the 25th amendment is more difficult than impeachment and conviction even if “such other body as Congress may by law provide” is substituted for the Cabinet.
(Requires 2/3 of both houses; impeachment requires majority of House, 2/3 of Senate).
What else would this commission on Presidential Disability do?