The U.S. Supreme Court ruled 7-2 on Thursday in Monsanto Company v. Durnell, siding with the agrochemical giant and affirming that federal law preempts state tort claims over pesticide labeling, a decision that could shield the company from thousands of cancer-related lawsuits. The ruling centers on the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), which the majority said grants the Environmental Protection Agency (EPA) exclusive authority to regulate pesticide labels, blocking state-level claims like those brought by Missouri resident John Durnell. NPR reported the decision, while SCOTUSblog confirmed the case was among several opinions released that day.
Supreme Court Ruling Clarifies FIFRA Preemption
The majority opinion, authored by Justice Brett Kavanaugh, held that FIFRA expressly preempts state law and Monsanto’s failure to warn consumers about the dangers of glyphosate. This directly addressed Durnell’s argument that Monsanto failed to warn consumers about glyphosate, the key ingredient in Roundup, which he alleged caused his cancer. NPR quoted Kavanaugh as stating, “Because Durnell’s state tort claim would impose a pesticide labeling requirement ‘in addition to or different from’ the label required by EPA, FIFRA expressly preempts Durnell’s claim.”
The decision aligns with Monsanto’s legal strategy, now owned by Bayer, which argued that federal regulatory clarity is essential for agricultural innovation. Bayer CEO Bill Anderson praised the ruling, saying it “provides the regulatory clarity necessary for innovators like us to develop the agricultural tools that guarantee an affordable food supply.” NPR noted Anderson’s statement, emphasizing the company’s push for uniform standards to avoid “a single Missouri jury second-guessing that judgment.”
Dissenting Voices Argue for State Jurisdiction
Justice Ketanji Brown Jackson, joined by Justice Neil Gorsuch, dissented, criticizing the majority for misinterpreting FIFRA’s preemption scope. Jackson wrote that adding a cancer warning to pesticide labels does not conflict with federal law and that the majority “leaves Durnell without a remedy for the significant harms he has suffered.” NPR highlighted her argument that Congress had yet to pass a “golden shield” for pesticide manufacturers, leaving state juries as a potential avenue for accountability.
Legal experts noted the dissent’s focus on the tension between federal regulation and state-level justice. Ashley Keller, Durnell’s lawyer, had previously argued that FIFRA does not bar states from evaluating failure-to-warn claims, a point Jackson echoed. NPR quoted Keller as stating, “Congress has been debating a golden shield for the company as part of the farm bill. But until Congress acts, state juries could and should still be able to evaluate such cases.”
Impact on Thousands of Pending Cases
The ruling could significantly narrow Monsanto’s liability in tens of thousands of lawsuits alleging Roundup caused cancer. NPR reported that the decision “deals a victory to the company’s new owner as it struggles to resolve costly lawsuits,” with experts suggesting it may stall or dismiss many pending claims. The EPA’s role in labeling remains central, with the majority opinion reinforcing its authority to set pesticide standards.
However, the dissent’s emphasis on state jurisdiction leaves room for future legal challenges. Jackson’s critique of the majority’s “misunderstanding of FIFRA’s requirements” could influence lower courts or legislative action. SCOTUSblog noted the case was one of several released that day, including Mullin v. Doe and Wolford v. Lopez, though its implications for pesticide liability are more immediate.
Protesters and Public Health Advocates React
The decision drew backlash from public health advocates, who gathered outside the Supreme Court in April 2026 to support people who say they were harmed by the weed killer and other chemicals, in allegiance with the Make America Healthy Again movement. NPR
