Clinton superdelegate Brad Ellsworth said Wednesday that he cast his vote in the May 6 Indiana Democratic presidential primary for Illinois Sen. Barack Obama , adding yet another intriguing twist to the mystery of just who the conservative freshman lawmaker supports. "In the booth, I voted for Obama," said Ellsworth, who announced after the Indiana primary that he planned to use his vote as a superdelegate to support New York Sen. Hillary Rodham Clinton unless there was a compelling reason not to back her.
