Jean Davidson, executive director of the National Symphony Orchestra, announced Friday she is departing her position to lead the Wallis Annenberg Center in Beverly Hills, marking another casualty in the chaos engulfing the Kennedy Center since Trump took control. Davidson, who held the NSO post for less than three years, cited a "really hard year" and a lack of communication from leadership. The exodus accelerates as legendary composer Philip Glass withdrew his symphony debut and banjo virtuoso...