But we have seen Mrs. Palin on the national stage for seven weeks now, and there is little sign that she has the tools, the equipment, the knowledge or the philosophical grounding one hopes for, and expects, in a holder of high office. She is a person of great ambition, but the question remains: What is the purpose of the ambition? She wants to rise, but what for? For seven weeks I've listened to her, trying to understand if she is Bushian or Reaganite—a spender, to speak briefly, whose political decisions seem untethered to a political philosophy, and whose foreign...