Stephen Colbert’s 12 best segments on immigration: http://www.salon.com/2014/11/21/when_colbert_went_to_washington_his_12_best_segments_on_immigration_reform/?source=newsletter

Immigration along I35.  This multiple-article series from May-June 2014 includes several articles about Iowa.  To access individual articles, go all the way to the bottom of the screen and click on Day 1, Day 2, etc.  Iowa coverage starts on Day 28.