Donald Trump announced plans for a roughly $300 million, 90,000-square-foot White House ballroom that the National Park Service has assessed as causing no significant impact while acknowledging major visual and landscape changes and estimating completion in Summer 2028.Matthew Quinn, the Secret Service deputy director overseeing the project, warned in a sworn declaration that any pause in construction would hamper the agency’s protective mission, and court filings by National Park Service liaison John Stanwich describe pre-demolition removals in August and September and documentation of the East Wing before its demolition in October as preservation groups press a legal challenge.