Saxophonist Branford Marsalis has won Grammys, played with artists including Miles Davis, Dizzy Gillespie and Sting, and was the leader of Jay Leno's house band. In recent years, he has also been scoring movies and playing more classical music.    He dropped by Paul’s office while was in Ottawa to perform with the National Art Centre Orchestra. He talks about life on the road, his recent homecoming to New Orleans, teaching, American politics, and of course, music.