A $400 million White House ballroom approved by the Commission of Fine Arts will include an underground complex, Trump says, funded by private donors.

The new White House ballroom is set to include a military bunker, President Donald Trump revealed on Sunday night. “The military is building a massive complex under the ballroom,” he told reporters aboard Air Force One.

President Donald Trump said Sunday the US military was planning to construct a large complex beneath the new ballroom he is building at the White House.

Donald Trump said the ballroom is ahead of schedule and under budget, calling it the greatest and claiming the military strongly supports the project

The president announced the military is building a large underground complex beneath his controversial White House ballroom project.

President Donald Trump has said the new White House ballroom "essentially becomes a shed for what's being built under."

Trump was taking questions from questions aboard Air Force One when he began holding up a series of architectural drawings.