The Federal Communications Commission told a federal court on Thursday that it acted properly when it repealed the U.S. government’s net neutrality rules in 2017, marking its first legal salvo in a campaign to battle 22 states and tech companies including Mozilla, Facebook and Google that contend the agency’s move was illegal.

Under President Trump, the FCC voted last December to undo rules that required Internet providers such as AT&T and Comcast to treat all Web traffic equally. To the agency’s Republican leader, Chairman Ajit Pai, his Democratic predecessors had erred in how they implemented net neutrality by treating broadband providers similar to old-school telephone utilities.

More at Washington Post.