That will never happen because there are too many other power-hungry people in the GOP who are not going to just let Trump sit in the White House indefinitely, if for no other reason.
If Trump wants to stay in office after this term is finished, all that matters are what the voters think. The supreme court will likely side with him and find an interpretation of the constitution that makes it work. But even if they don't, so what? The court doesn't have an army. Even if they did, if the voters want a king, that is what they will get. The republic is a reflection of our collective will and we can destroy it if we so choose.