Sen. Chuck Hagel backed down this week from previously held positions on nuclear arms cuts during meetings with senators who are considering his nomination to be defense secretary in an apparent effort to sway those concerned about his liberal anti-nuclear views. Hagel has told senators he is no longer a staunch supporter of the nuclear weapons views of retired Marine Corps Gen. James Cartwright, who authored an anti-nuclear weapons report sponsored by the international disarmament group Global Zero. “Hagel has thrown Cartwright under the bus about the Global Zero [report] in his meetings with senators,” said a congressional aide familiar...