A federal appeals court has made a ruling regarding a construction project at the White House. The Trump administration had planned to build a large ballroom, but the court has ordered construction to halt. The project's cost is reported to be $400 million.

The court's decision was made in response to a lawsuit by historic preservationists. A three-judge panel determined that President Donald Trump does not have the authority to construct the ballroom without congressional approval. Further details about the ruling and its implications are available from the source.

The court has allowed a two-week stay to permit an appeal to the US Supreme Court.