In a filing, Trump’s administration ‌asked the supreme court justices to keep the ​decision by the US court of appeals for ⁠the District of Columbia ​circuit ​on hold ​while it ​prepares ‌a full ​appeal.

“This case involves an extraordinary and unlawful injunction that will halt the ongoing construction of the integrated military complex including a totally secure ballroom space, at the East Wing of the White House, which is vitally required by national security,” D John Sauer, the solicitor general, wrote in the filing.

The appeals court upheld a lower court’s order blocking aboveground work on the ballroom until Congress grants its approval, but allowed construction on the underground security structure to continue. It also paused its own ruling for two weeks, until 21 August, to give the administration time to lodge its appeal to the supreme court.

The government argues that “every part” of the project is “an integrated whole geared toward remedying security deficiencies and bringing critical improvements to the White House”.