4 Days, 20 Democrats. Who Won the Iowa State Fair?. Presidential Election of 2020, Iowa, Sanders, Bernard, Warren, Elizabeth, Harris, Kamala D, Yang, Andrew (1975- ), Booker, Cory A, Biden, Joseph R Jr, Klobuchar, Amy, de Blasio, Bill, Bullock, Steve, Ryan, Timothy J (1973- ), Castro, Julian, Gabbard, Tulsi (1981- )