States could make life really hard for the companies. Impose taxes on those that are not neutral, make permitting difficult and even start up state run internet.
That's the idea. Get the Federal government out of the business of regulating the internet & open it up to competition.
The cartel practices of the ISP oligopoly is a separate issue. They bought the state legislatures. The people of each state that is under the influence of the ISP cartels should demand an open internet for their state.