Iowa Sen. Joni Ernst will not seek re-election in 2026, altering the Senate race dynamics.

Iowa Republican Senator Joni Ernst, first elected in 2014, will not seek re-election in 2026, according to CBS News. This decision could impact the Senate balance, currently held by Republicans 53-47. Ernst's departure raises the stakes for both parties in the 2026 midterms, with four Democrats and Republican Rep. Ashley Hinson reportedly planning to run. Iowa Democratic Party Chair Rita Hart commented that anger over healthcare and cost increases contributed to Ernst's decision.