California's attorney general, Rob Bonta, on Thursday sued the US Department of Commerce in federal court in San Francisco. The suit seeks to stop the administration from withholding the state's roughly $1.86bn broadband grant unless California repeals its own broadband laws. The complaint, filed in the US District Court for the Northern District of California, names Commerce Secretary Howard Lutnick and the National Telecommunications and Information Administration (NTIA) as defendants.

The lawsuit follows a public dispute this week over the Broadband Equity, Access, and Deployment (BEAD) programme. Congress created the $42.45bn fund in the 2021 Infrastructure Investment and Jobs Act. Bonta's office called the NTIA's demand "preposterous" and argued that federal law gives the agency no authority to rewrite state statutes. The state has continued pressing to have its final proposal approved while refusing to abandon the rules in question.

The complaint argued that the NTIA had imposed conditions that Congress never authorised. It said this breached the Spending Clause of the US Constitution and the Administrative Procedure Act, according to the filing. The NTIA overhauled BEAD in 2025 under its "Benefit of the Bargain" restructuring, which removed earlier preferences for fibre and cut affordability requirements. California says the agency has since used approval of state plans as leverage over unrelated state policy.

The case is likely to become a test of how far the Commerce Department can attach policy demands to infrastructure money already appropriated by Congress. Officials at the NTIA have said they will approve plans that deliver connections at the lowest cost to taxpayers.

A Commerce Department spokesperson said the agency would defend its administration of the programme in court. Broadband advocacy groups in California warned that any prolonged legal fight could delay construction for households still without high-speed internet.

Other states with Democratic attorneys general are watching the case closely, because several have consumer-protection and affordability rules of their own. Legal analysts at Stanford Law School noted that federal courts have repeatedly blocked attempts by the administration to impose new conditions on congressionally allocated grants. A ruling on any request for a preliminary injunction could come within weeks.

"Congress promised this money to connect Californians, not to buy the repeal of laws our legislature passed," Mr Bonta said in a statement announcing the suit.