General Discussion

(Support for his actions, they are hardly worthy of being called policies, among Republicans is usually about 80%. Immediately after the failed coup attempt his support dropped into the 40's. But when it became apparent that he would not be held personally responsible the support went back to around 80%).
Authoritarians do not navigate reality based on facts and logic, they use their beliefs. And any facts which contradict their belief system bounce off.
About 20% of Republicans are authoritarian leaders. They will go along with an authoritarian Strong Leader like Trump if that is what is necessary to keep them in power. But until they believe that supporting Trump damages them personally they will go along.
There are is one-third of the electorate who couldn't be bothered to vote because they are still getting their hamberders and sportsball. Some of these will wake up as things go bad under Trump. Hopefully enough of them in strategic voting districts can be educated and motivated to counter the Republican gerrymandering and disenfranchisement which are being ramped up.