The Justice Department says President Trump can proceed with the reported $900 million White House ballroom project under existing presidential authority without returning to Congress, even as the legality of the work remains before the Supreme Court. In court filings, the administration said the project is already two-thirds complete, with 250 workers operating 20 hours a day, seven days a week, and framed the ballroom as both an event space and a security-related upgrade tied to the Presidential Emergency Operations Center, or PEOC. Democratic lawmakers and other critics dispute the national security rationale and have raised concerns about historic preservation, transparency, accountability, and the use of both private donations and taxpayer funds.