The first targets would be those attempting to confiscate firearms.Then move on to command and control people.
The easier safer thing to do is just shut the country down. Don’t go to work in what ever job you do. The unions do it without much trouble. What would happen if 10,000,000 job holding, taxpayers did it?
Don’t work, don’t spend, etc. No trains, no airplanes no communication. How many power plant workers are there that voted for Mr Trump?
War would be won without a shot fired.