WASHINGTON (AP) — A federal appeals court on Friday ordered the Trump administration to halt construction of its $400 million ballroom at the White House without congressional approval. In a 2-1 decision, the U.S. Court of Appeals sided with historic preservationists who sued to stop construction. Attorneys for the preservation group countered that the lack of a White House ballroom doesn’t constitute a national security emergency. In response, the appeals court instructed the judge to reconsider the national security implications of stopping construction. The judge stressed that the White House is free to proceed with below-ground work, including the construction of any bunkers, military installations and medical facilities.