I’ll offer 2 threads in answer to "how do we fight this?"
Warning: There are no easy solutions. The current GOP was decades in the making, and an authoritarian tradition in the U.S. runs deep.
How to fight this in a nutshell:
We need the truth to come out, which will happen as the current investigations unfold, as the Democratic House gets its investigations going, and as they get better at conducting hearings.
We also need lots of grassroots organizing.
I volunteered as lawyer to monitor polls and vote tabulation in 2016 and 2018 and I spent time on the Texas border giving legal advice to asylum seekers. I offered to go back but they had enough volunteers—so a lot of people are stepping up.
Elections are conducted locally. It’s not too early to find out what your state has in the way of voter protection. I can think of a few states that need some work in this area (understatement).