The orchestra’s board has promised for months that one is coming “soon,” but the president and his hand-picked Kennedy Center board have remained mum. The orchestra has played with Nas, Babyface and CeCe Winans, fusing the classics with hip hop, gospel, jazz and indie sounds. Before Trump turned the Kennedy Center into a symbol of national polarization rather than civic pride, the NSO drew about 300,000 people a year to its concerts. But the orchestra’s audiences have diminished sharply since Trump took over the Kennedy Center. The judge handling a lawsuit against Trump and the Kennedy Center this week extended his deadline until late August for a report on how the Center plans to present performances this fall.