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WASHINGTON: A US federal appeals court ordered President Donald Trump’s administration on Friday to stop construction on a $400 million ballroom on the site of the White House’s demolished East Wing, dealing the Republican leader a major setback in a case testing his presidential authority.

“Each president is a temporary tenant, not the owner, of the White House” and cannot fundamentally reshape it without congressional appro­val, the Washington-based Court of Appeals for the district of Columbia said in a 2-1 opinion.

The order upheld a preliminary injunction won by the National Trust for Historic Preservation, which sued last year after the administration tore down the East Wing and began building a 90,000-square-foot (8,360-square-metre) ballroom without seeking authorisation from Congress.

“Whether or not a massive ballroom should be constructed is for Congress to decide and is not a matter for executive self-help,” the panel’s majority wrote. “Congress has not ceded unfettered authority to the executive branch to dramatically redesign, reshape, and reconstruct the White House to fit a particular president’s desires.”