Refuse to hand over their jurisdiction to the military. Declare the military to be an unlawful invasion and a break of 10th Amendment rights. Etc. etc.
At that point, you're turning the local police over to the Protester's side. And the Police hold strong sway over the local judges and politicians. FOP in particular is powerful lobbying group because they hold the blessings of the Police.
What is Trump going to do? Order the military to fire upon the Police? Lulz. That's not how any of this works, and its not how coups work either. Over control of fucking St. Louis? Its not even worth the hassle.
Passive voice because you're ignorant. Who will place people in concentration camps?
Because the who is incredibly important in this scenario and tells us how to fight. Are you saying the military will be deployed to create concentration camps across America? Are you saying local Police need to build these camps and maintain them? Or, does Donald trump need to pass a new law + build a new organization from scratch that will oversee this?
For-profit prison system still requires $$$$ to be pumped in for it to work. Where does Trump get the money for these facilities? Do the local states pay for them?
I'm talking about our serious next option here. Not pie in the sky fantasy scenarios. The realistic move is a boneheaded attempt by Trump to deploy the military for a mass deportation attempt, but he hasn't thought that far ahead yet. He hasn't figured out where people will be imprisoned, he hasn't figured out how to train the military for this task. He hasn't figured out US Citizen rights during deportation sweeps. He hasn't figured out jurisdiction yet. Etc. etc.
There's details to the plan that we can disrupt as it comes into fruition. We resist at every step and stop it at every turn possible.