At the end of a long day, President Donald Trump likes to unwind by hearing about the latest construction updates on his beloved $400 million ballroom, according to a report. Despite legal battles, construction is moving ahead on Trump’s pet project, which saw the historic East Wing razed to the ground in October. The project has proved largely unpopular with the public . A site manager for the Washington, D.C.-based construction firm Clark Construction works out of a trailer on the grounds of the White House, and on some evenings is called into the Oval Office “to go over details” with Trump “for more than an hour at a time,” The Washington Post reports , citing a person familiar with the conversations. “His version of a bourbon is construction,” the source reportedly said of Trump, who is famously sober. The revelation came as the White House hosted a reception Wednesday evening for the group that manages donations to the project, the newspaper reports.…