MARSHALLTOWN, IA - JANUARY 10: Democratic presidential candidate and U.S. Sen. Bernie Sanders (I-VT) drew an overflow crowd to a campaign event in the 600 person capacity meeting room of the Best Western Regency Inn on January 10, 2016 in Marshalltown, Iowa. Both Republican and Democratic presidential candidates have been making appearances at events across Iowa to build support in advance of the 2016 Iowa Caucuses. (Photo by Charles Ledford/Getty Images)