As President Trump strives to remake Washington in his image, his White House ballroom project stands apart. In court filings this week, his administration insisted that halting construction of the $400 million ballroom would amount to a national security threat — a departure from the broader claims of executive power undergirding other projects.

The Trump administration indicated that it will go to the Supreme Court if the federal appeals court that has the case now doesn't rule in the president's favor.

Donald Trump posted a cryptic, no-context image of the White House lawn as the controversy around the ballroom renovations continues

The Times reported that ArcelorMittal, a firm in Luxembourg and the second-largest steelmaker in the world, is providing steel for the structure of the ballroom project, citing the two sources. The steel is said to have been produced in Europe, where the majority of ArcelorMittal's production is concentrated.

The New York Times reports that ArcelorMittal is providing steel for the structure of the White House ballroom project from its manufacturing operations in Europe, not in Alabama.