Orsted, the Danish renewable energy giant, sued the Trump administration on Thursday, saying the government’s move to halt a nearly finished wind farm off Rhode Island was unlawful and “issued in bad faith.”

The administration last month took the remarkable step of ordering work to stop on Revolution Wind, a $6.2 billion offshore wind farm that was nearly 80 percent complete, as part of a campaign to block wind projects. In a letter to Orsted, the Bureau of Ocean Energy Management alluded to national security concerns with the project but did not elaborate.

On Thursday, Revolution Wind LLC, a joint venture between Orsted and Skyborn Renewables, asked the U.S. District Court for the District of Columbia to prevent the administration from enforcing the stop-work order. The complaint alleges that the order was arbitrary and capricious in part because it appeared to be carried out under political pressure from the White House.

The attorneys general of Connecticut and Rhode Island also said that they would file a separate lawsuit Thursday in the United States District Court for Rhode Island to overturn the stop-work order.

The 65-turbine Revolution Wind project had obtained financing as well as all necessary permits from the Biden administration. Construction began in 2023, and the developers had said it was on track to produce enough electricity for more than 350,000 homes in Rhode Island and Connecticut by next spring.

In their complaint, the developers said that they had already spent $5 billion on the project and would incur another $1 billion in financial penalties from failing to complete it, while also losing billions of dollars in future revenue if the project was canceled.