The planned $400 million project has been a priority for the president.
https://www.washingtonpost.com/politics/2026/03/31/judge-trump-white-house-ballroom
A federal judge ordered a halt to construction of President Donald Trumps White House ballroom, ruling that Trump lacks authority to fund the estimated $400 million project through private donations.
U.S. District Judge Richard Leon disagreed with the Trump administrations argument that the president has broad authority to make changes to the White House, including on the scale of his planned, 90,000-square-foot ballroom.
The President of the United States is the steward of the White House for future generations of First Families. He is not, however, the owner! Leon wrote in a 35-page ruling issued Tuesday afternoon. He said that no statute comes close to giving the President the authority he claims to have.....
Lawyers for the National Trust, which is charged by Congress with preserving historic buildings, also focused on Trumps decision to solicit private donations, saying that the project needed express authorization by Congress.
Rather than admit that none exists, the Defendants invent a Rube Goldberg machine to justify proceeding with the project without express congressional approval, the National Trusts lawyers argued in court filings in January.