Iowa State Fair: Why do you have to come here to be president?

Iowa plays a big role in presidential politics because of its first in the nation caucuses. Even by that standard, though, this time around feels busier, and the Iowa State Fair has been flooded with candidates for offices from the presidency on down. We talked to David Redlawsk, a political psychologist who is spending his ENTIRE sabbatical in Iowa, about why this is all happening. Learn more about your ad choices. Visit megaphone.fm/adchoices