President Donald Trump says he will immediately appeal to the U.S. Supreme Court after a federal appeals court ordered construction halted on his White House ballroom project. Multiple reports say the appeals court ruling finds that Trump and the executive branch lack legal authority to proceed with the “massive” or “sprawling” ballroom project without congressional approval. Trump argues the decision would jeopardize the ability of future presidents to use the planned space, and he frames the dispute as one affecting presidential operations beyond his term. The reporting also indicates that Trump’s next step is a Supreme Court challenge timed to follow the halt order from the lower court. The outlets summarize the central legal issue as whether congressional authorization is required for the project’s funding and construction. Both sources agree that the appeals court order is the immediate trigger for Trump’s vowed appeal, and that Trump intends to ask the Supreme Court to overturn or stay the halt pending further review.