Businessman Zach Lahn delivered a significant upset in Iowa’s Republican gubernatorial primary, defeating Rep. Randy Feenstra, who had received the endorsement of President Donald Trump. This victory marks a rare electoral setback for Trump in a primary season that had largely seen his preferred candidates succeed.
The narrow win on Tuesday exposed potential vulnerabilities within Trump’s coalition in the deeply conservative state, offering encouragement to Democrats who are optimistic about their chances of flipping the governor’s office this year.
It also signaled a potential breakthrough for the “Make America Healthy Again” (MAHA) movement, which has been critical of the Trump administration’s stance on pesticides and has strongly backed Lahn’s platform, which advocates for regenerative farming and challenges large agricultural corporations.
“I will take on the big ag cartels. I will break up their monopolies, and I will get Iowa farmers a fair deal,” Lahn declared in his victory speech late Tuesday.
Members of the MAHA movement, a diverse coalition of supporters of Health Secretary Robert F. Kennedy Jr. with priorities ranging from ending vaccine mandates to promoting healthy soil and organic food, celebrated the win as evidence that their political message is resonating with voters.
“This election is a signal that pro-pesticide does not mean pro-farmer,” stated Tony Lyons, president of the Kennedy-aligned MAHA PAC, which had endorsed Lahn. “Zach Lahn made transitioning away from toxic chemicals the cornerstone of his campaign and won this election decisively with strong farmer support.”
Lahn, a farmer and former conservative political director, was relatively unknown in Iowa before launching his campaign last November. He successfully championed policies appealing to the state’s conservative grassroots, including a total ban on abortion and efforts to keep liberal ideologies out of school curricula.
Lahn, who owns an investment company and resides on a century-old family farm in eastern Iowa, effectively leveraged activist skepticism toward Feenstra, criticizing his opponent for not participating in debates and for a limited presence on the campaign trail.
Crucially, the candidate also cultivated a strong following within the MAHA movement, vocally opposing the consolidation of farmland by corporate owners and addressing health concerns linked to farming practices and poor water quality.
Iowa, a prominent agricultural state, has a powerful farm lobby that has historically resisted mandatory regulations on chemical use in water. However, dangerously polluted drinking water has become an increasingly pressing issue, with agricultural runoff causing nitrate levels to surge, necessitating expensive filtration systems in Des Moines, the state capital.
During a May debate, Lahn characterized water treatment system upgrades as a “Band-Aid,” stating his goal as governor would be to “decrease the nitrate load in the water in the future so we have less stress on that system.”
In recent months, MAHA activists had vocally supported Lahn, growing increasingly frustrated with the Trump administration and its Environmental Protection Agency over actions they perceived as counterproductive to public health. Earlier this year, they protested after Trump issued an executive order aimed at boosting the production of glyphosate, a controversial herbicide ingredient. They also organized a protest at the Supreme Court in April against Monsanto’s Trump-backed efforts to shield itself from lawsuits.
Lahn has consistently opposed liability shields for pesticide companies, a stance he emphasized during his primary victory speech.
“Iowa has the fastest growing cancer rate in the world,” Lahn asserted. “We all know something is terribly wrong. But too many politicians from Washington, D.C., to Des Moines have had their heads stuck in the sand while big ag and big pharma printed money. This will not go on when I’m governor.”
MAHA figures quickly hailed Lahn’s victory as their own. “MAHA has done its job proving it’s politically radioactive to stand with chemicals over children,” commented Turning Point USA podcaster Alex Clark on social media. “Iowa knows pesticides are causing cancer which is exploding in their state. Tonight they opted for change.”
Trump had remained silent on Iowa’s gubernatorial race until the week before the primary, when he praised Feenstra as “MAGA all the way” and pledged he would “fight tirelessly” for the state on issues such as the economy, border security, and law enforcement.
The influence of the president’s endorsement had been demonstrated earlier in the primary season, contributing to the defeats of senators John Cornyn of Texas and Bill Cassidy of Louisiana, as well as Rep. Thomas Massie of Kentucky.
However, Feenstra’s loss represents a clear setback for Trump, creating an opportunity that Democrats are poised to exploit.
State Auditor Rob Sand, the sole Democrat currently holding statewide office, is the party’s nominee for governor. Unopposed in the primary, Sand has refined his moderate message, highlighted his rural upbringing, and amassed an $18 million campaign fund.
Feenstra conceded the race to Lahn on Tuesday, indicating a willingness to unite for the party’s benefit. He stated he called Lahn to tell him to “carry the torch.” Lahn, looking ahead to November in his victory speech, signaled he would campaign against Sand using a traditional conservative talking point.
“Rob Sand wants you to believe he’s a moderate,” he said. “We’ve seen this movie before.”
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