n Stephen King's new novel, "Under the Dome," the people of Chester's Mill, Me., get a letter from the president. Typically exalted in its rhetoric, it wrings a tear from at least one grateful citizen. But Big Jim Rennie, the town's second selectman, is disgusted. He scowls at the printed sheet. Yep, there it is in black and white: "The bastard had signed it himself, and using all three of his names, including the terrorist one in the middle."