The Iowa State Fair has kicked off, and Republican candidates are vying for face time with voters in a presidential race dominated by Donald Trump. Former Vice President Mike Pence and North Dakota Gov. Doug Burgum both played up their Midwestern credentials, while Florida Gov. Ron DeSantis is aiming to stump across all of Iowa’s 99 counties. CNN Political Director David Chalian breaks down what to expect this weekend.To learn more about how CNN protects listener privacy, visit cnn.com/privacy