Donald Trump just made a statement about his ballroom renovation project's latest legal development, and it's safe to say that he is not pleased.

An appeals court on Friday upheld an order halting work on Donald Trump's prized White House ballroom, enraging the US leader and setting up another Supreme Court battle over the limits of presidential authority.

The US Court of Appeals for the DC Circuit, which had allowed construction to continue while it considered the case, agreed with a lower court that such a massive White House overhaul required the explicit consent of Congress.

It stayed its own decision for two weeks to give Trump time to ask the Supreme Court to intervene.

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The Republican president lashed out after the 2-1 ruling, calling it "horrendous, politically motivated, and unlawful."

The two judges in the majority were appointed by Democratic presidents, while the dissenter was nominated by Trump himself.

The president vowed in a lengthy social media post to immediately appeal to the Supreme Court.

"This decision, made after much of the work has been done and paid for, is a National Security Threat at the highest level. It is also a National Disgrace," Trump said in another post on his Truth Social platform Friday night.

Trump initially touted the construction of the ballroom as being necessary to host galas, but has since repeatedly pointed to the concurrent addition of an underground military bunker and other security features.