“…Salvanto’s polling currently indicates that few House seats will change hands in November — and that the GOP could very well hold its majority in the House. “In this era, a district’s voting patterns from the past tend to stay that way,” Salvanto said. “Not as many partisans today are willing to cross party lines.” Of the nation’s 435 House districts, fully 85 percent will almost certainly stick with its current party affiliation come November, Salvanto projects…”
https://nypost.com/2018/08/18/cbs-news-pollster-reveals-why-blue-wave-is-unlikely/