An arts panel made up of Trump appointees approves his White House ballroom proposal

“Our sitting president has actually designed a very beautiful structure,” Cook said before the voting. “The United States just should not be entertaining the world in tents.”

Cook echoed one of Trump's arguments for adding a ballroom to the White House: It would end the long-standing practice of erecting temporary structures that Trump calls tents on the South Lawn to host visiting dignitaries for state dinners and other functions.

Cook said no other president had taken steps to correct that “until President Trump.”

The project will be the subject of additional discussion by the National Capital Planning Commission in March.

At the fine art's commission's January meeting, some commissioners questioned the lead architect about the “immense” design and scale of the project even as they broadly endorsed Trump's vision for a ballroom roughly twice the size of the White House itself.

Some changes suggested at that meeting were made and were welcomed by the commissioners on Thursday.

Trump's decision in October to demolish the East Wing prompted a public outcry when it began without the independent reviews, congressional approval and public comment that are typical even for relatively minor modifications to historic buildings in Washington.

The National Trust for Historic Preservation has sued in federal court to halt construction of the ballroom. A court decision in the case is pending.

The project is scheduled for additional discussion at a March 5 meeting of the National Capital Planning Commission, which is led by one of Trump's top White House aides. The commission has jurisdiction over construction and major renovations to government buildings in the region.

This story has been corrected to reflect that the ballroom was approved by six of the seven commissioners and that one commission did not vote because he was the initial architect on the project.