Iowa voters chose nominees Tuesday for two statewide races expected to draw national attention in November: businessman Zach Lahn won the Republican primary for governor in a field that included President Trump-backed Rep. Randy Feenstra, while Democratic State Auditor Rob Sand ran unopposed for his party’s nomination. Feenstra conceded late Tuesday, and Lahn’s win marked a rare Republican primary defeat this cycle for a Trump-endorsed candidate. In the U.S. Senate race to replace retiring Re...

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