1) an army of civil rights defense attourneys to counter the DOJ, DHS, etc.
2) a force of federal agents who have the authority to interefere with any federal, state or local law enforcement activity, but completely lack the ability to touch citizens. Their sole mission would be to detain law enforcement officers suspected of abusing their power, raid illegaly acquired/held state confiscation staches, liberate detained civilians, confiscate/destroy/release government secret records, interfere with unlawful border patrol, and execute on the spot any law enforcement agent caught in the act of violating person's civil liberties.
They will watch the watchmen.