A federal appeals court panel will consider whether President Trump's $400 million White House ballroom project has been legal amid ongoing construction for seven months. Despite a lawsuit from the National Trust for Historic Preservation and a lower court order to halt work, Trump's administration has continued the project while appealing the ruling, creating a constitutional standoff.

The case tests the separation of powers between the executive and legislative branches, with Judge Richard J. Leon finding no legal path to building without congressional authorization. Six Republican senators joined Democrats in attempting to block construction, though they fell eight votes short. Trump has recently framed the project primarily as a security bunker rather than a ballroom.

The panel of three judges—Obama appointee Patricia A. Millett, Biden appointee Bradley N. Garcia, and Trump appointee Neomi Rao—must decide whether to uphold Judge Leon's order. Regardless of the outcome, the case represents a significant challenge to presidential authority over federal property and spending powers that could reshape governance boundaries.