In early July, while most Americans were preparing for a long weekend of celebratory parades, charred meats, and noisy fireworks, Sarah Palin made some plans of her own. The Alaska governor had been the object of endless media attention and assorted calumnies since she became John McCain's vice presidential nominee last August. Now she wanted to try something new. So, on July 3, in a speech delivered from her home on Lake Lucille in Wasilla, Palin told her constituents that not only would she not seek a second term, but she would also be transferring authority to Lieutenant Governor Sean...