What is the central legal question before the Supreme Court in Monsanto v. Durnell?

The central legal question is whether companies can be held liable under state law for failing to warn consumers of a pesticide’s potential dangers when the federal government does not require such a warning.

Who is the plaintiff in the case, what health condition does he allege resulted from Roundup use, and how is Bayer involved?

The plaintiff is gardener John Durnell, who filed a lawsuit in 2019 in Missouri state court alleging he developed non-Hodgkin lymphoma after decades of exposure to Roundup; Bayer is involved because it acquired Monsanto in 2018 and assumed all its liabilities.

Supreme Court hears Bayer Roundup liability case with billions at stake

Apr 28, 2026

The US Supreme Court heard oral arguments in a case concerning Bayer and Monsanto's liability for glyphosate-based Roundup, addressing potential state law warnings for cancer risks absent federal mandates.

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