Well for starters you need to read Saul Alinski’s Rules for Radicals. If they want to do violence to the constitution then you show up witht a large vociferous and angry crowd at the congressman’s district office and you hang around there until he is forced to close it. Then you find out where his house is, where his kids go to school, grandmas house etc etc and you show up there with a large and vociferous crowd.
If your congressman wants to start down an illegal and unconstitutional path then follow him down that path and chances are he will soon see why we have laws and why we expect even congressmen to obey them. See if your congressman really wants to let the genie out of the bottle because I think he is living under the delusion that civil society is maintainable by a handful of police officers and the publics unwillingness to go as far as he would to get what he wants.
And you point is, besides not being able to count on any elected official to stop this madness?