That will take much more that four years, I think, as Trump is not the cause but the culmination of decades of Republican pandering to the bigots, racists, anti-science and "Christian" wing-nuts that is the current GOP base. Along with taking the authoritarian path with election denialism as a central rallying point.
Trump showed what so many of the GOP elected officials are made of: morally hollow shells cloaked in cowardice.
On the plus side there are many, but not enough, real Republicans.