All seven Iowa legislators who faced competition for their party’s nominations prevailed in the June 4 elections. The outcome was a reversion to normal following a tumultuous 2022 cycle, in which six Iowa House Republicans lost their primaries. Two years ago, Iowa’s new political map forced three pairs of House members to face off against each other, and Governor Kim Reynolds endorsed challengers against several more GOP lawmakers who had opposed her “school choice” plan.

Crucially, Reynolds did not endorse any 2024 candidates running against incumbents. On the contrary, she backed one of the incumbents in a tough primary.

In addition, property rights proved to be a less potent issue here than in South Dakota, where fourteen Republican lawmakers lost to primary challengers on June 4.

Although Iowa saw no upsets, several of this year’s legislative races revealed that Republicans could be vulnerable to candidates from the right. The two challengers who came closest to knocking off incumbents were both vocal opponents of using eminent domain to build CO2 pipelines.

This post covers the primaries from the narrowest winning margin for the incumbent to the most comfortable victory.