The answer, delivered during a debate with Democratic challenger Adam Hamilton, aligned Marshall with President Donald Trump's freshly antagonistic posture toward Ukraine, which has spent more than four years defending itself against an invasion.

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.

This time, the exchanges focused on policy, though both candidates repeatedly returned to their central attacks.