Full Breakdown
Supreme Court Blocks State Failure-to-Warn Claims Against Bayer’s Roundup
6/27/2026, 7:57:55 PM
Supreme Court Decision
In a 7-2 ruling issued on June 25 2026, the U.S. Supreme Court held that federal pesticide law preempts state-law claims that Bayer AG (owner of Monsanto) failed to warn consumers that Roundup’s active ingredient, glyphosate, could cause cancer. The majority, written by Justice Brett Kavanaugh, concluded that because the EPA has not required a cancer warning on Roundup’s label, states cannot impose additional labeling requirements. Justices Ketanji Brown Jackson and Neil Gorsuch dissented, arguing the decision “unjustifiably closes the courthouse doors” to plaintiffs like John Durnell.
Background & Context
Roundup, introduced in the 1970s, became the world’s most widely used herbicide. In 2015 the WHO’s International Agency for Research on Cancer (IARC) classified glyphosate as “probably carcinogenic to humans.” The EPA, however, has repeatedly concluded that glyphosate is unlikely to cause cancer when used as directed and has not required a warning label. The divergent scientific assessments fueled a wave of litigation after Bayer acquired Monsanto in 2018.
Timeline
- 2015 – IARC classifies glyphosate as “probably carcinogenic.”
- 2020 – EPA determines glyphosate is “not likely” to cause cancer; label unchanged.
- 2023 – Missouri jury awards John Durnell $1.25 million for failure-to-warn claim.
- June 2026 – Supreme Court issues 7-2 decision blocking state failure-to-warn claims.
Data & Statistics
- Approximately 200,000 Roundup-related claims have been filed nationwide, most from home-use customers.
- Bayer has already paid ? $11 billion to settle about 95,000 lawsuits and proposes a $7.25 billion class-action settlement for remaining claims.
- Glyphosate ranks among the top three pesticides used in Iowa (2010-2019).
Key Figures & Groups
- John Durnell – Missouri gardener who sued Monsanto in 2019 after developing non-Hodgkin lymphoma.
- Bill Anderson – Bayer CEO, defended the ruling as beneficial for farmers.
- Justice Brett Kavanaugh – Authored the majority opinion.
- Justice Ketanji Brown Jackson – Wrote the dissent.
- MAHA movement – “Make America Healthy Again” activists, including Kelly Ryerson (“Glyphosate Girl”) and Vani Hari (“Food Babe”).
- Farm groups – National Corn Growers Association, American Soybean Association, National Association of Wheat Growers.
- Iowa Farmers Union – President Aaron Lehman, vocal opponent of the decision.
Why It Matters / Impact
The ruling removes a primary legal avenue for thousands of plaintiffs alleging cancer risks, potentially limiting compensation for affected individuals. Farmers and agribusinesses cite regulatory clarity and continued access to an inexpensive weed-control tool. Public-health advocates warn the decision may reduce incentives for safer formulations and diminish accountability for chemical manufacturers.
Official Statements & Responses
- Bayer: The decision “is good for science, farmers, and industries that depend on regulatory clarity for innovation” and will help “significantly contain the Roundup litigation.”
- National Corn Growers Association: Called the ruling “great news for all farmers” and emphasized the need for “clear, consistent labeling.”
- American Soybean Association: Stated the decision “reaffirms the value of sound science in the regulatory process.”
- National Association of Wheat Growers: Praised the “regulatory clarity” that supports “innovators” and “affordable food supply.”
- MAHA activists: Described the ruling as a betrayal of public-health goals and urged congressional action.
- Iowa Farmers Union: Warned the decision “gives blanket protections to pesticide companies and removes incentives for safer formulations.”
Criticism & Opposition
Environmental groups and plaintiffs’ attorneys argue the ruling shields corporations from liability despite scientific evidence linking glyphosate to cancer. MAHA activist Kelly Ryerson labeled the decision “unforgivable,” while Vani Hari called it “sickening.” Iowa legislators, including Rep. Anna Paulina Luna (R-FL) and Rep. Cory Booker (D-NJ), announced plans to introduce bills stripping liability protections from pesticide manufacturers.
Conflicting Reports & Gaps
- EPA: Finds glyphosate unlikely to cause cancer; no warning required.
- IARC: Classifies glyphosate as “probably carcinogenic.”
- Scientific literature cited by the EPA includes a now-retracted study, raising questions about the robustness of the agency’s risk assessment.
Verbatim Quotes
- “This decision is good for American farmers who help feed the world. It provides the regulatory clarity necessary for innovators like us to develop the agricultural tools that guarantee an affordable food supply,” — Bill Anderson, Bayer CEO
- “This Supreme Court ruling wrongly slams the courthouse door on Americans sickened by pesticides,” — Christopher Seeger, plaintiffs’ attorney
- “Never in history has an administration so blatantly and willingly sold out our fertility, vitality, and health to corporate interests,” — Kelly Ryerson, MAHA activist
- “The decision is sickening and would have never happened had the administration not given Bayer Monsanto a favor,” — Vani Hari, MAHA activist
- “Giving protection to the biggest manufacturer of pesticides in the world isn’t getting us on the path to safer, more effective herbicides,” — Aaron Layman, Iowa Farmers Union president
- “These companies purposefully omit labeling information knowing their products cause cancer and other health problems. It is time they are held accountable,” — Anna Paulina Luna, U.S. Representative
What’s Next
Bayer will continue pursuing its $7.25 billion settlement in Missouri state court. Lawmakers from both parties are drafting legislation to overturn the preemption doctrine applied by the Court. MAHA and consumer-advocacy groups plan further public campaigns to pressure the EPA for a revised glyphosate risk assessment.
