The real action is going to have to happen at state level, with “police de-paramilitarization laws”.
The first part of the law gives the state governor and attorney general the authority to prescribe what equipment police departments in the state are allowed to have and use.
Equipment outside of this list, unless granted special waivers by the state for special needs, must be turned over to their respective county Sheriff for storage and safekeeping. (This is a necessary requirement for those who argue that the police departments might need it in the future.) And it can only be used either by the Sheriff’s office, or for a limited time and use based on the written warrant of a country judge. Likewise, no police agency below the level of county Sheriff can have or use a SWAT team.
The second part of this law prohibits all direct contact between city police departments and the federal government, in either direction. This means grants from the feds, of money and/or equipment, and information exchange, must go through the state. In the case for requests for cooperation, they can only happen through their respective county Sheriff’s office, with their acquiescence.
The third part of the law is to change the curriculum of the state police academies, so there is minimal SWAT training, moving in the direction of civilian, not paramilitary, policing.
You speak of laws in a lawless regime.