To accomplish what you want to accomplish will require taking a neo-fascist approach. You're not ready for the discussion of suspending freedom and democracy in favor of a new wave of authoritarianism required to undo generations of damage done to this nation.
It's going to go deeper than just nationalizing DC and arresting those pesky Democrats. It's going to require forcibly removing people from positions of power and forcibly removing certain races of citizens out of the country. It will not be accomplished under your "muh constitution". You need to be prepared to go to the right of the National Socialists of Germany.