Trump dominates in Iowa as GOP caucus nears

Former president and front-runner Donald Trump boasts a 30-point lead over his rivals in Iowa as the Republican caucus approaches. NBC News' Vaughn Hillyard reports from Des Moines on what to expect in the final weeks leading up to the critical caucus as candidates hit the campaign trail in the Hawkeye State. » Subscribe to NBC News: https://www.youtube.com/user/NBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! Breaking News Alerts: https://link.nbcnews.com/join/5cj/breaking-news-signup?cid=sm_npd_nn_yt_bn-clip_190621 Visit NBCNews.Com: https://www.nbcnews.com/ Find NBC News on Facebook: https://www.facebook.com/NBCNews Follow NBC News on Twitter: https://twitter.com/NBCNews Get more of NBC News delivered to your inbox: nbcnews.com/newsletters #nbcnews #trump #iowa