https://phys.org/news/2018-06-washington-state-sues-google-facebook.html

Ferguson said neither Facebook nor Google did so, even though Washington candidates and political committees have spent nearly $5 million to advertise on those platforms in the past decade.

"Washington's political advertising disclosure laws apply to everyone, whether you are a small-town newspaper or a large corporation," Ferguson said in a statement. "Washingtonians have a right to know who's paying for the political advertising they see."