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 in its tracks, arguing that it creates burdensome, anti-consumer requirements that go against the federal government's approach of deregulating the Internet.
"Once again the California Legislature has enacted an extreme and illegal state law attempting to frustrate federal policy," U.S. Attorney General Jeff Sessions said in a statement.
The law is the latest example of the nation's most populous state seeking to drive public policy outside its borders and rebuff President Donald Trump's agenda. Brown did not explain his reasons for signing the bill when the decision was announced, but supporters cheered it as a win for internet freedom.