I think what happened is some States that wanted it gone told the Attorney General that they would challenge it as a violation of the APA unless it was rescinde

I think what happened is some States that wanted it gone told the Attorney General that they would challenge it as a violation of the APA unless it was rescinded, but then it was rescinded, so that lawsuit was never filed. EDIT: it was filed, not sure if it's still pending or what, see https://news.ycombinator.com/item?id=23565025 https://news.ycombinator.com/item?id=23565025