What would it take for the Democrat-controlled House and Senate to get that process started?
He won't be impeached. He will be ruled incapacitated and the VP will step in while he is under medical care (probably from the professionals at Betty Ford).
He may be ruled incapacitated, but they’ll have to pry his claws out of the Oval Office draperies. Meanwhile we’ll have Mutt-chelle LaVaughn Robinson in the Edith Wilson role. Now there’s a thought to shiver your timbers.