IOWA CITY, IOWA - JULY 07:  Democratic presidential candidate Hillary Clinton addresses supporters at an organizational rally at the Iowa City Public Library on July 7, 2015  in Iowa City, Iowa. The campaign stop provided a few hundred supporters and campaign workers with an oppurtunity to hear from the former Sectratary of State about her platform for her run the office of President of the United States.  (Photo by David Greedy/Getty Images)