US president Donald Trump has repeatedly complained that the White House lacks sufficient space for grand galas and unilaterally ordered the ballroom’s construction. (EPA Images pic)WASHINGTON : An appeals court on Friday upheld an order halting work on Donald Trump’s prized White House ballroom, setting up another battle in the Supreme Court over the limits of presidential authority. It stayed its own decision for two weeks to give Trump time to ask the Supreme Court to intervene. Trump, who has repeatedly complained that the White House lacks sufficient space for grand galas such as state dinners, unilaterally ordered construction of the massive ballroom. Several of the projects have similarly faced legal challenges, but the ballroom project would be the first to reach the Supreme Court.