And no, that's not exclusive to Trump and what ICE has been up to, vanishing people into deportation camps. Climate change, the increasing frequency of pandemics, PFAS/forever chemicals, the list of stuff being swept under the rug instead of being acted against grows longer by the day.
That was a thing. One of my family members had to round up an entire town of German citizens and march them through the death camps as none of them believed it was a real thing. They got to see and smell it for themselves. Some were still in disbelief that their own soldiers committed such horrific acts.
In the US the closest thing to keep an eye on would be the FEMA camps. Most are in very remote locations. If Russian and Chinese start to vanish those are the first places I would look and there are many such camps. By that point the internet would likely be entirely censored and people would have to authenticate with a centralized service to use the internet at all. I would expect those implementing such services to be members here so one can only hope they chime in when the planning starts. I would expect this to eventually be a MitM agent that runs on phones and computers to monitor pre-encrypted content to report on suspicious words and phrases. It might be silently deployed to all cell phones much like the past CarrierIQ but as a helpful AI this time. The PC versions would probably get inserted quietly in OS updates under the guise of a helpful AI as well. Those working on it may not even realize it's intended purposes. I would be curious to see how they sneak it into Linux and BSD.