At the moment, their bus was passively observing two tall green walls of murky pines, and a line of slumping fence posts with corroded barbed wire. They were parked on Interstate Highway 10, ten miles beyond the eldritch postindustrial settlement of Sulphur, Louisiana. Sulphur had attracted a lot of bemused attention from the krewe of staffers as their campaign bus flitted through town. In the curdled fog of winter, the Cajun town seemed to be one giant oil refinery, measled all over with tattered grass shacks and dented trailer homes.