“When Beltway insider Jack Valenti died two years ago at age 85, he was playing the role of intermediary between Washington and Hollywood as the theatrical, snowy-haired president of the Motion Picture Association of America. But back in 1964, Valenti was a Houston ad executive newly installed at the White House as a top aide to President Lyndon B. Johnson. And J. Edgar Hoover’s FBI found itself quietly consumed with the vexing question of whether Valenti was gay.”