they have to assert it in court and usually don't

I would never join a cartel like the American Bar Foundation myself, but that's not my understanding.

https://www.aarp.org/health/medicare-insurance/info-2020/obs...

I hope you all the best. We live in a Second World country.

You need to talk to an attorney, as this understanding is incomplete. Parties can and do sue the federal government all the time. Look at the Supreme Court decisions this week alone which include several cases against the United States.

But I also suggest physically going to your congressperson’s office (the local one in your district, not DC) and explaining the situation. Instead of calling/waiting for a response.

Good luck.