SACRAMENTO, Calif. (AP) — California Gov. Jerry Brown signed the nation's toughest net neutrality measure Sunday, requiring internet providers to maintain a level playing field online. The move prompted an immediate lawsuit by the Trump administration.

Advocates of net neutrality hope the new law in the home of the global technology industry will have national implications by pushing Congress to enact national net neutrality rules or encouraging other states to follow suit.

But the U.S. Department of Justice wants to stop the law, arguing that it creates burdensome, anti-consumer requirements...