Democrat Sarah Trone Garriott has defeated two-term Republican U.S. Rep. Zach Nunn in Iowa's 3rd Congressional District, flipping a seat that both parties had treated as one of the nation's premier battlegrounds. The Hill reports that Decision Desk HQ projected Trone Garriott’s victory at 11:22 p.m. EST, capping a contest that drew heavy spending and national attention to central and southern Iowa.
The win makes Trone Garriott, a Lutheran minister and state senator from West Des Moines, Iowa's first Democratic member of the U.S. House in four years, according to the Axios article that broke down the seed facts of this race. The Des Moines Register reported Trone Garriott had ousted Nunn and noted that unofficial Iowa Secretary of State results showed Trone Garriott with 55% of the vote to Nunn's 45%. The Washington Examiner, however, reported a different split, saying Trone Garriott led with 54.6% when the Associated Press called the race at 12:03 a.m., with Nunn trailing at 45.4%, according to the Washington Examiner. Decision Desk HQ separately projected Trone Garriott would win by nine percentage points with 88% of the vote counted, per The Hill.
A District That Keeps Changing Hands
Iowa's 3rd District includes Des Moines and much of southern Iowa, The Hill reported. The seat flipped to Republicans in 2022 and back to Democrats in 2026, and this cycle it was considered a top Democratic national target as the party tried to break through Republican dominance across the state.
Nunn first won the seat in 2022, narrowly ousting then-Rep. Cindy Axne by less than a percentage point, the station's report through The Hill noted. He won a second term in 2024 against Democrat Lanon Baccam by nearly four percentage points. Throughout this year's campaign, Nunn, a two-term congressman, emphasized his bipartisan record along with tax cuts and support for Iowa farmers.
Campaign Cash and a Late Shift in the Odds
Money poured into the race from both sides. Trone Garriott's campaign raised more than $8 million and spent $6.9 million as of late October, while Nunn reported raising more than $6.2 million and spending nearly $6 million, per the Des Moines Register. Outside groups added roughly $25.6 million more as of Tuesday, according to OpenSecrets figures cited by the same outlet.
Handicappers had been signaling trouble for Nunn before Election Day. Cook Political Report and Sabato's Crystal Ball both shifted the race from toss-up to lean Democratic in October, with The Hill reporting the shift reflected both the broader political environment and Trone Garriott's polling advantage. The Hill also described the district as one of the most difficult of Iowa's four congressional seats for Republicans to hold and a major battleground heading into the midterms.
What the Flip Means for Iowa's Delegation
Trone Garriott campaigned on making life more affordable for Iowa families and protecting access to health care, according to Axios, while the Des Moines Register reported she also pledged to end tariffs and improve health care accessibility and affordability. Trone Garriott's victory flipped the seat to Democrats.
The scale of that shift was underscored by The New York Times, which noted Iowa had not been represented by a Democrat in the Senate since 2015 or in the House since 2023, and that the state is now poised to have just one Republican senator and one Republican representative in the next Congress. Trone Garriott is set to take office in January 2027.
