The D.C. Circuit upheld most of the Federal Communications Commission’s 2018 order retreating from net neutrality. But the court struck down the portion of the order disallowing states and local governments from adopting measures preempting the order. Numerous states and local governments challenged the legality of the order.
Net neutrality requires internet service providers to treat all Internet communications the same and not block, speed up or slow down any content. Net neutrality was federal policy until the 2018 order.