PHOTO: Bernie Sanders, Jan. 31, 2016, in Waterloo, Iowa. Hillary Clinton arrives in Des Moines, Jan. 30, 2016. Donald Trump walks onstage for an event in Sioux City, Iowa, Jan. 31, 2016. Ted Cruz speaks in Des Moines, Jan. 31, 2016, in Des Moines.

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PHOTO: Local resident Matthew Sorenson registers at the West Des Moines Precinct 1 and 2 GOP Caucus held at the Seven Flags Event Center January 3, 2012 in West Des Moines, Iowa.

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