No breaks on the Trump train! If the GOP turns on him the Trump-fanboys will turn on them. They will either have to watch USA burn or risk losing voters and political power. (We shall see which they care more about.)
My guess is they'll wait until the ACA repeal. That will hit Trump's base hard, if they spin it right they can blame it on him in a way that's convincing to grassroots Republicans who, lets face facts, are probably just dumb enough to buy it.
Then it's pres Pence and the only opposition they'll get is from the hardcore Trumpites, IE the Nazis and they're easily dismissed.