The Att'y Gen'l of the U.S. and the Att'y Gen'l of Washington, DC, can find him unqualified at any time through a process of quo warranto. If he is not found to be qualified after being inaugurated, the VP takes the job, all documents signed by the usurper are void, he has to return all renumeration paid him, and his name is stricken from the record as ever having served as President. Then the Senate, I believe, supplies a VP.
You are 1/2 right. Only Congress can remove an otherwise qualified President.
The Att’y Gen’l of the U.S. and the Att’y Gen’l of Washington, DC, can find him unqualified at any time through a process of quo warranto. If he is not found to be qualified after being inaugurated, the VP takes the job, all documents signed by the usurper are void, he has to return all renumeration paid him, and his name is stricken from the record as ever having served as President. Then the Senate, I believe, supplies a VP.