Laws constraining law enforcement are already on the boks, law enforcement just chooses to ignore them along with judges who issue meaningless paperwork without the fines and jail for contempt that might induce all but the worst to start following the law.
In addition, we now have an administration that thinks it doesn't have to follow the law, at all, and have seriously compromised an entire umbrella agency to the point it has become a private army for one small group of people.
DHS can't be fixed, it can only be defunded and abolished. The days of "this is the law, now just be nicer" are long over. Any jackass in either party who doesn't get this needs to go.
Think of what Fatso and his rich dudebros have cost us over the last year: USAID, affordable health care,VOA, our contribution to the WHO, and the good will and trust of most of our allies. I think we're past due time to cost them something. DHS was a bad idea when it was rammed through after 9/11. It can't be fixed by toothlss laws or guidelines a lawsless administration has no interest in following.i It has to go and anyone who doesn't understand that needs to go, too.