We may very well be entering a new stage in the Trump saga where Republicans try to move past Trump, but he refuses to leave the national stage. This could be called the Glenn Close stage (ala "Fatal Attraction") as Trump declares to the GOP that he will not be ignored.
Trump's relationship with the GOP has always been, at its core, a basically dysfunctional relationship, but the GOP hitched its wagon to Trump probably hoping that he would rise to level of the office of President, or at least ameliorate his worst behavioral impulses. Trump never has, and he never will because he is simply incapable of doing so.
The simple fact of the matter is that Trump doesn't care about anything but himself, and he will unhesitantly burn down the GOP if they try to move on from him. As this becomes more and more clear, Republicans will have to decide if they're willing to allow a figurative politically drowning man to pull them and their party down under the waves with him, or will it finally be the time for the GOP to come together and dump him by publicly giving him a collective dose of his own medicine. Regardless, it's going to be incredibly ugly to watch, and it will be unlike anything we've ever seen before. And to make matters worse, it will all unfold as Trump's criminal investigations and his civil suits progress. That will only serve to make him more combative even though that's his default setting in his interactions with people who refuse to cave to his will.