BBC News
By Jake Horton & Lucy Gilder
BBC Verify in Washington DC
In the year since US President Donald Trump announced plans to build a new ballroom at the White House, the proposals have grown to include a rooftop “drone port”, an underground hospital and “top secret” military facilities – and the estimated price has doubled to $400m (£300m).
Despite promises from Trump that the project wouldn’t cost US taxpayers any money, Republicans have requested additional funds from Congress for security around the complex – at a time when Americans are struggling with rising living costs linked to the Iran war.