HAIFA, Israel - The Pentagon's clandestine efforts to persuade senior Iraqi officials to turn on Saddam Hussein may be the last hope of avoiding a bloody urban battle in Baghdad. While the reward is so great that the strategy is worth pursing, nobody should hold out much hope for success. The Iraqi dictator constructed his military and political system precisely for this kind of worst-case scenario. Consider the Republican Guard. Since 1988 it has been under the direct command of the presidential palace rather than the army. Because of this, its soldiers have received the best equipment and training, and...