Rhode Island, Connecticut and the developer of an offshore wind farm that would power 350,000 homes in the two states are suing the Trump administration for stopping the nearly completed project.

PROVIDENCE, R.I. (AP) — Connecticut, Rhode Island and the developer of an offshore wind farm that would power 350,000 homes in the two states said Thursday that they’re suing the Trump administration for stopping the nearly completed project.

Rhode Island Attorney General Peter Neronha accused President Donald Trump of waging an “all-out assault” on the wind energy industry. The states’ lawsuit, filed in U.S. District Court in Rhode Island, describes the Revolution Wind project as a “cornerstone” of their clean energy future, abruptly halted by federal officials without “statutory authority, regulatory justification or factual basis.”

Danish energy company Orsted filed a separate suit in U.S. District Court in Washington, D.C., also arguing that the administration lacks the legal authority to block the Revolution Wind project. Orsted said it would seek a preliminary injunction that would allow it to move forward with the project, which is 80% complete, with all underwater foundations and 45 of 65 turbines installed.