We've had a number of free and fair elections in the past year, including some where the Trump-supported candidate lost. That doesn't mean we're out of the woods, but Trump has not historically been willing to go out of his way to protect the electoral fortunes of people who aren't himself, and at least some of his allies are well aware that the peace and security we presently enjoy is not guaranteed in a post-democratic US.
When it comes to harm on this scale, always expect the worst, because the harm will be generational. More importantly, Trump doesn't give a flying fuck about anything outside of the executive branch and below the federal level, because the federal level executive has control of the instruments of war. And he has already proven that nobody manning those instruments of war will disobey him. The Marines got recalled, but the National Guard didn't. This latest thing with Venezuela is just one more section of the window that's been wiped clear enough for him to see what he can do. The final bit that's still obscured is whether or not he can give direct orders to the military and security agencies to subjugate the state levels of government. I've got a large amount of certainty that within the next week or two even that bit of obscurity won't remain.
As I always tell people, if you're right there's no point in arguing about it, so the only thing I would say is that you owe it to yourself to check your predictions. Set a reminder for January 25 to confirm whether Trump has ordered the military and security agencies to invade any state capitols. I did this a few times last year, and immigration policy is really the only topic where the "expect the worst" heuristic has worked for me.
My personal belief is that he will try it and it will fail, but that will of course lead to the Coast Guard and the National Guard being rescinded from the DHS and governor's control by decree and being placed under the Navy and the Army respectively. Currently this power exists in theory, but it's never truly been implemented, even during World War II. This is something that Hegseth publicly considered when West Virginia's state Congress decided that the extended deployment of the state's National Guard troops to Washington D.C. was not within presidential power and ordered them back.