When candidates went stumping around the country, people traveled for miles on foot, by horse, by carriage to hear them speak.当竞选人在全国作巡回演说时，人们会步行、骑马或坐车数英里赶去听他们的演讲。Sale of network time to candidates involves preemption of better paying advertisers.把电视广播网时间卖给竞选人使用，就必然要舍弃出价较高的广告商。