Here's what the endgame would look like.

Let's say that at some point there is a very large number of people who think that Trump has to be relieved of the presidency. The question is, how to do it. The two obvious alternatives that preserve the rule of law are impeachment and the 25th Amendment process. There are extra-legal possibilities, but I'm holding out hope those won't happen.

Even if there's a 25th Amendment process or an impeachment, we'd still have to deal a rogue president at the head of the executive branch while the process is ongoing. I can't see any way to avoid putting Trump under de facto house arrest and cutting off his communications. This would require the cooperation of domestic law enforcement (the FBI, The Secret Service, U.S. Marshals, and the capitol police) and the military. The military would need to buy in because they would not be put in the position of sitting on their hands while their Commander-in-Chief is being deposed unless they're fully on board with the idea that this is a legitimate and lawful action. Similarly, law enforcement would have to be fully on board because they'd be the boots on the ground. The only way to do it without them is to roll tanks up Pennsylvania Avenue and that would be the end of even a pretense of democracy.

Both of those groups would need the assurance that the politicians had their 25th Amendment/impeachment ducks in a row and that once things were in motion that there would be a speedy process that would absolutely certainly remove Trump. Otherwise, they'd all be guilty of treason and mutiny and would probably hang (and that's not a figure of speech).

Obviously, getting all of those groups on board in while maintaining secrecy would be the mother of all heavy lifts, but does anybody think Trump and his Deplorables would sit idly by while open and public proceedings (like those directed at Bill Clinton) ground on for months?