How Many Iowa House Seats Will Democrats Win in 2026

Reps. Zach Nunn and Mariannette Miller-Meeks, Republicans in competitive Iowa House districts, joined Democrats and a handful of GOP colleagues on Tuesday in voting for a resolution to end U.S. military action against Iran without congressional authorization, reversing earlier votes against similar measures. It was the third such House vote, with a similar margin to prior attempts but a few more Republicans defecting, including retiring Rep. Nancy Mace and Reps. Tom Barrett, Warren Davidson, Brian Fitzpatrick and Thomas Massie. Rep. Ashley Hinson, running for Iowa's open Senate seat, voted against the measure, saying she wants a "decisive and immediate victory" instead.

The reversal comes amid political pressure ahead of the midterms, with the war remaining broadly unpopular and fuel and diesel prices rising as harvest season begins. Both Nunn and Miller-Meeks cited the need to bring troops home and end an open-ended conflict; 18 U.S. service members have died in the war, including two from Iowa. The White House says it has briefed Congress more than 30 times since February. Nunn had recently campaigned with Defense Secretary Pete Hegseth, prompting a Hatch Act complaint from former national security officials. Both lawmakers face competitive rematches in November, underscoring how the war's unpopularity is shaping battleground House races.

Republican Rep. Zach Nunn and Democratic challenger Sarah Trone Garriott, a state senator, are facing off in Iowa's 3rd Congressional District, one of the nation's most closely watched 2026 midterm races. In Des Moines Register candidate questionnaires, both named affordability as a top priority but offered sharply different diagnoses and fixes.

Trone Garriott blamed Nunn's votes for tariffs and Medicaid cuts for raising costs and threatening the Affordable Care Act, pledging to restore ACA subsidies and reverse Medicaid reductions. Nunn pointed to tax cuts, a rural health care investment, and efforts to lower drug prices and gas prices as evidence of progress, while defending his support for tariffs targeting China and Canada. On immigration, both credited reduced border crossings but diverged on enforcement tactics and legal pathways. The two also split on the Iran war, with Trone Garriott criticizing the lack of a congressional war vote and rising fuel and fertilizer costs, while Nunn defended new war powers oversight and sanctions legislation. The general election is Nov. 3.

Iowa has become an unexpectedly competitive state heading into the midterms, with contested races for Senate, Governor, and multiple House seats. In the Senate contest, Republican Ashley Hinson faces Democrat Josh Turek, who has outperformed past Democratic candidates and earned an endorsement from Barack Obama. Polling shows a tight race, but Hinson remains favored given the state's strong Republican lean. Analysts note that a Democratic win would require a favorable environment, a strong candidate, and a weak GOP nominee — conditions only partially met so far.

Democrats appear stronger in the governor's race, where Rob Sand, a proven statewide winner, faces Republican Zach Lahn, whose residency and spending choices have drawn criticism. Sand's independent-leaning campaign style has helped him poll ahead. In the House, Iowa's 1st District leans toward a Democratic pickup, the 2nd is expected to hold for Republicans following Hinson's Senate run, and the 3rd, held by Zach Nunn, remains the most competitive due to its lighter Republican tilt.

Iowa state Sen. Sarah Trone Garriott, the Democratic candidate for Iowa's 3rd Congressional District, criticized Congress and the Department of Justice for inaction on investigating Jeffrey Epstein and his associates. She spoke after visiting a traveling "reading room" exhibit at The Loft DSM, staged by the Institute for Primary Facts and DEFIANCE.org, featuring excerpts from DOJ-released Epstein investigation documents. She met with family members of Virginia Giuffre and self-identified Epstein victim Sharlene Rochard.

Trone Garriott criticized incumbent Rep. Zach Nunn for not signing Rep. Thomas Massie's discharge petition, which would let state attorneys general, victims and members of Congress sue the DOJ over withheld documents; only three other Republicans have signed it. Nunn's campaign countered that he voted for the Epstein Files Transparency Act and accused Trone Garriott of skipping Iowa Senate votes on sex-offender sentencing. Giuffre's brother, Scott Roberts, thanked Trone Garriott for hearing survivors' stories and called for congressional leaders willing to hold powerful figures accountable.

President Trump rallied in Sioux City, Iowa, backing Senate candidate Rep. Ashley Hinson, Rep. Zach Nunn, and Rep. Randy Feenstra, telling supporters to "pretend I'm on the ballot" and warning that Democratic gains would threaten GOP wins on tariffs, trade and farm policy. Hinson, running against Democratic state Rep. Josh Turek in a tight contest that could decide Senate control, has distanced herself from Trump on issues like his Russia diesel deal, the Iran war's economic fallout, and tariffs, even as she campaigned alongside him. Polls show the race within a few points either way, with early voting already underway in Iowa.

Iowa's rising cancer rate has emerged as a bipartisan issue in the state's competitive 2026 midterm races for Congress and governor. Iowa has the second-highest cancer rate in the country, behind only Kentucky, and is one of just three states where rates are climbing, driven by increases in lung, prostate and breast cancers. Candidates from both parties, including Republican Rep. Zach Nunn and Democratic challenger Sarah Trone Garriott, have made the issue central to their campaigns, with voters increasingly linking it to concerns about nitrate contamination in water from agricultural runoff.

Democrats such as Senate candidate Josh Turek and House candidate Christina Bohannan have tied the issue to opposition against Medicaid cuts under President Trump's tax and spending law, warning of coverage losses for Iowans. Republicans, including Rep. Ashley Hinson, have emphasized expanding cancer screening access and conservation funding. Scientists remain divided on whether nitrate-contaminated water is driving the increase, and a state-commissioned study has yet to reach firm conclusions, but polling shows water quality now ranks among voters' top concerns heading into the election.

A debate between candidates for Iowa's open 2nd Congressional District seat turned contentious, with Republican land developer Joe Mitchell and Democratic state Rep. Lindsay James trading personal accusations of financial corruption and criticizing each other's use of family members during the campaign. The exchange marked an escalation in an already bitter race for the northeastern Iowa seat being vacated by Rep. Ashley Hinson, who is running for the U.S. Senate.

The 2nd District contest is considered one of the more competitive House races heading into the 2026 midterms, making the tone and substance of these debates relevant to broader expectations about the district's partisan lean. Personal attacks over ethics and family involvement could shape voter perceptions in a race already drawing national attention as both parties look to flip or hold the open seat.

Iowa, which has voted reliably Republican for over a decade and backed Donald Trump three times, is shaping up as an unexpectedly competitive battleground in the 2026 midterms. Democrats see real chances to flip the governorship, a Senate seat, and several House races, aided by a large bloc of independent voters and a state economy strained by tariffs on agricultural goods, rising diesel prices tied to the Iran conflict, and rural hospital closures linked to Medicaid cuts. Polling shows a majority of Iowans disapprove of Trump and believe his policies have raised living costs.

Republican Sen. Joni Ernst's retirement opens a competitive Senate race between Rep. Ashley Hinson and Democrat Josh Turek, a former Paralympic gold medalist. In a recent debate, Hinson repeatedly attacked Turek's attendance record in the Iowa legislature, including missed votes on the state farm bill and rural health funding, and demanded he refund per diem payments; Turek countered by criticizing her lack of in-person town halls. In the governor's race, Democratic State Auditor Rob Sand is pitching an economic-populist message against Republican Zach Lahn, who has faced questions over his Iowa residency. Analysts note Iowa's history of razor-thin House margins, making it a key test of whether Democrats can reclaim congressional control.

Iowa Democrats are hoping the 2026 midterms mark a turning point after nearly a decade of Republican dominance in the statehouse and congressional delegation. Political scientists note Iowa has swung both ways in recent cycles, and Cook Political Report now rates the 1st and 3rd Congressional Districts as leaning Democratic, with the 2nd District a toss-up. The governor's race between Democrat Rob Sand and Republican Zach Lahn also leans Democratic. Analysts cite frustration with GOP control of state and federal government, a large pool of independent voters, bipartisan messaging from candidates like Sand and Senate hopeful Josh Turek, and softer approval ratings for President Trump as factors fueling Democratic optimism ahead of the Nov. 3 election.