Full Breakdown
Supreme Court Weighs Blocking Roundup Cancer Lawsuits
4/28/2026, 9:25:06 PM
Background and Legal Context
Roundup, a glyphosate-based herbicide sold by Monsanto, a Bayer subsidiary, faces a wave of lawsuits. In 2015 the WHO’s International Agency for Research on Cancer labeled glyphosate “probably carcinogenic,” while the EPA deems it “not likely carcinogenic” when used as directed and approved a label without a cancer warning. EPA reviews labeling only every 15 years, a schedule noted by Justice Ketanji Brown Jackson. The Supreme Court heard arguments on April 27 2026 on whether state courts may proceed despite the federal label.
Parties and Litigation Scale
The suit before the Court was filed by Missouri resident John Durnell, a longtime neighborhood “spray guy” who was awarded $1.25 million after a jury linked Roundup to his non-Hodgkin’s lymphoma. Bayer, which bought Monsanto, disputes the claims but has set aside $16 billion for settlements and earlier offered a $7.25 billion package. Over 100,000 Roundup claims, mainly from home users, have been filed. Bayer has stopped using glyphosate in residential Roundup and says ongoing litigation could force a pull from agricultural markets. The American Farm Bureau Federation warned that such a withdrawal would threaten the nation’s food supply.
Official Court and Corporate Positions
Chief Justice John Roberts asked whether a 15-year EPA review “ties the hands of state courts,” and Justice Brett Kavanaugh questioned the uniformity of state-level requirements. Bayer argues that federal labeling should preempt state lawsuits and points to its $16 billion settlement fund as evidence of resolution. The company warns that continued suits could compel it to withdraw glyphosate from U.S. agriculture, a step the American Farm Bureau Federation says would threaten the nation’s food supply.
Opposition and Criticism
Environmental groups argue that Bayer’s approach seeks to keep juries out of the cases, asserting that state courts provide essential oversight of federal labeling. Dozens of MAHA activists staged a rally titled People vs. Poison outside the Court, emphasizing their view that glyphosate poses a cancer risk despite an executive order promoting its production for food security.
Conflicting Scientific Assessments
The WHO’s 2015 classification of glyphosate as “probably carcinogenic” contrasts with the EPA’s determination that it is “not likely carcinogenic” when used as directed. This scientific divergence fuels the legal dispute over labeling and warning requirements.
Verbatim Quotes
- “Throughout that long process, in response to information that suggests there is a risk that’s not on the label, the states cannot do anything?” — Chief Justice John Roberts
- “Do you think it’s uniformity when each state can require different things?” — Justice Brett Kavanaugh
- “immediate, devastating risk to America’s food supply” — American Farm Bureau Federation (court filing)
- “People vs. Poison” — MAHA rally participants
Anticipated Outcomes
The Court is slated to issue its decision by the end of June 2026. A ruling that permits state lawsuits could pressure Bayer to withdraw glyphosate from U.S. agriculture, while a decision favoring federal preemption would preserve the current labeling regime and limit state-level warnings.
