The only way they can go back to their old ways is if they have their own little civil war. The Republican party is in chaos mode. Trump was elected and politicians whom would have ignored him except for donations are trying to gain his favor so they have favor with their own voters.
We will see if the old/classic Republicans can take back their party. As it seems right now- it may be no for a while. If you can be non-partisan and look at it from an intellectual, curios way, it is one of the most historic times for a political party.
Will the religious right get their party back? Who are the Republicans now? What do they stand for as a party? What is their identity? Chaos.