On Thursday, Hinson will join President Donald Trump for a rally in Sioux City, which is in Iowa's conservative northwest corner. The visit to safe territory is geared toward boosting turnout even as it ties her more tightly to an unpopular president.

Democrats and aligned advocacy groups are hitting the airwaves with a flood of campaign ads on the Iran war as they seek to win back in the House and Senate.

Economic concerns such as tariffs and rising gas prices may give Democrats an opening in November's midterms. But rural voters remain skeptical of large-scale support for Democrats.