As for the USA, let me put it this way: If Trump gets elected, with the tech tools the govt has, we will see, at the very best, another Hong Kong, with anyone that disfavors the Repubs disappearing, some permanently. At the worst, we will see another Nazi Germany. He himself proposed executing people.
If you practice privacy and can teach others, your skills will be valuable to the underground resistance.
https://apnews.com/article/trump-executions-biden-death-penalty-brandon-bernard-c1b26807c5c40b337d14485c3d6df2de
When authoritarian governments have complete power they don’t really checks and balances to the system, or juries. Take Putin - Navalny for example. You would know this if you aren’t a Holocaust denier.