When the Trump administration decided last year to dump net neutrality rules designed to treat all data equally, the states revolted.

Thirty legislatures introduced bills to prohibit internet service providers from hindering access to certain sites and charging fees for faster speeds.

Four states, including California, passed laws, and six governors issued executive orders declaring they would not do business with Internet providers that violated net neutrality.

“People were upset across the country,” said Ernesto Falcon, legislative counsel for the Electronic Frontier Foundation, which supports net neutrality.

The Trump administration decided to fight back Sunday and challenge California’s law, the broadest in the nation. It would restore Obama-era rules governing Internet access, which barred blocking, throttling and paid prioritization and established a process for filing complaints.