A new Suffolk University poll shows Iowa State Auditor Rob Sand, the Democratic candidate, holding a narrow lead over Republican businessman Zach Lahn in the state's open governor's race. The survey, conducted August 20-23, found Sand ahead 48% to 44% among 500 likely Iowa voters, with 9% undecided. The margin of error is plus or minus 4.4 percentage points.
The gubernatorial race remains highly competitive, with recent polls showing fluctuating margins. An Emerson College Polling/Nexstar survey from August 2-4 had Sand leading 48% to 43%, while a New York Times/Siena College poll from mid-to-late June showed a tighter 48% to 47% race. A Fox News poll from late June indicated Sand’s widest lead of the cycle at 53% to 44%.
Prediction markets have shifted significantly in recent months. In June 2025, Kalshi gave Republicans a 71% chance of holding the governor’s office, but those odds have since flipped, with Democrats now at 74-78% depending on the day. Polymarket shows a similar tilt, having shifted toward Democrats as early as January 2025.
Cancer Crisis Dominates Iowa Campaign Trail
Cancer has emerged as a defining issue in Iowa’s November elections, with candidates in the gubernatorial and Senate races offering competing solutions to address the state’s second-highest cancer diagnosis rate in the nation. Researchers estimate 21,700 Iowans will be diagnosed with cancer in 2026, and 6,400 will die from the disease. Roughly 2 in 5 Iowans are expected to receive a cancer diagnosis in their lifetime.
The Iowa Cancer Registry reports that Iowa is one of only three states where cancer diagnoses are rising despite a national downward trend. Breast, prostate, lung, and skin cancers are among the most prevalent, though researchers caution against attributing the state’s high rates to any single environmental cause. Questions about agricultural chemicals and water contaminants have fueled political debate, with candidates from both parties acknowledging the crisis but differing on solutions.
The Cook Political Report rates the gubernatorial race as “leans Democrat” and the Senate race as a “toss-up.” The four major candidates—Democrats Rob Sand and Josh Turek, and Republicans Zach Lahn and Rep. Ashley Hinson—have all framed cancer as a critical issue, though their proposed approaches vary.
Economic Strain and Trump’s Sinking Support Complicate GOP Hopes
Economic pressures on Iowa’s farming sector and declining approval of President Donald Trump have further complicated the Republican Party’s decade-long dominance in the state. David Paleologos, director of the Suffolk University Political Research Center, noted that voters who supported Trump by double digits in 2024 are now split nearly evenly on the governor’s race and Senate contests.
The Muscatine County bellwether, long considered a proxy for the statewide electorate, mirrored the Suffolk poll’s results, with Sand leading 48% to 44%, and 8% undecided. Analysts attribute the tightening race to shifting voter priorities, including healthcare concerns and economic anxiety, which have overshadowed traditional partisan divides in some areas.
Key Takeaways for Iowa Voters
- The gubernatorial race remains within the margin of error, with Sand maintaining a narrow but fluctuating lead.
- Cancer incidence and mortality rates in Iowa are among the highest in the U.S., prompting candidates to propose differing policy responses.
- Economic strain on farmers and declining Trump support have eroded the GOP’s traditional advantage in the state.
- Prediction markets now favor Democrats in the governor’s race, reflecting recent polling shifts.