WASHINGTON —

President Donald Trump was sued on Friday by preservationists asking a federal court to halt his White House ballroom project until it goes through multiple independent reviews and wins approval from Congress.

The National Trust for Historic Preservation, a privately funded group, is asking the U.S. District Court to block Trump’s White House ballroom project, which already has involved razing the East Wing, until it goes through comprehensive design reviews, environmental assessments, public comments and congressional debate and ratification.

Trump's project has prompted criticism in the historic preservation and architectural communities, and among his political adversaries, but the lawsuit is the most tangible effort thus far to alter or stop the president's plans for an

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