"Whistlestop tells the human story of nervous gambits hatched in first-floor hotel rooms, failures of will before the microphone, and the cross-country crack-ups of long-planned stratagems. At the bar at the end of a campaign day, these are the stories reporters rehash for themselves and embellish for newcomers. Whistlestop is a ride through the American campaign history with one of its most enthusiastic conductors pointing out the landmarks along...