Rep. Zach Nunn (R-IA) and State Sen. Sarah Trone Garriott (D-IA) are projected to face off in the general election for Iowa’s 3rd Congressional District.
The contest sets the stage for a high-profile battle in the November 2026 [1] general election, as both candidates have now cleared their primary hurdles.
Both Nunn and Trone Garriott ran unopposed [1] in their respective primaries held this Tuesday. Because neither candidate faced a challenger within their own party, Decision Desk HQ projects a head-to-head contest between the two for the seat.
The race focuses on Iowa’s 3rd Congressional District, a key battleground where the candidates will spend the coming months vying for voter support. With the primary phase concluded, the campaign now shifts toward a general election cycle that will determine the representation for the district in the U.S. House.
Nunn, currently serving as a member of the U.S. House of Representatives, seeks to maintain his presence in Washington. Trone Garriott, a member of the Iowa State Senate, aims to move from state-level legislation to the federal stage.
As the November 2026 [1] date approaches, the focus will likely shift to the specific policy differences between the Republican incumbent and the Democratic challenger. The absence of primary opposition allows both candidates to preserve their campaign funds for the final stretch of the election cycle.
“Both candidates ran unopposed in their respective primaries”
The lack of primary challengers for both the Republican and Democratic nominees streamlines the path to the general election and prevents early resource depletion. This creates a direct ideological clash between a sitting federal representative and a state legislator, making the 3rd District a focused point of contention for party control in the U.S. House.





