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.