So, we have a first amendment, we actually cannot prohibit or penalize someone for distributing propaganda to our citizens, that law would be illegal to make. We can make them register as foreign agents, that’s how the tenet media people got in trouble, that and being shady with where their money was coming from. We have no charges for propaganda distribution though, despite the very clear evidence of the behavior.
To your other question, like I said, I have no real good ideas on concrete steps we can take that might prove useful. Unless we want to repeal the first amendment or something, which I don’t think is a good idea.