Supreme Court backs Monsanto in its fight against liability from popular weed killer

On April 27, 2026, protesters gathered at the U.S. Supreme Court as it ruled in favor of Monsanto, now owned by Bayer, shielding the company from liability over its weed killer, Roundup. The case, brought by Missouri resident John Durnell, centered on whether federal law overrides state claims regarding pesticide labeling. The Supreme Court, in a 7-2 decision, stated that the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) preempts state law, giving the U.S. Environmental Protection Agency the authority to set labels. This decision could limit Monsanto’s liability in numerous lawsuits claiming that glyphosate, Roundup’s key ingredient, causes cancer. Justice Ketanji Brown Jackson dissented, arguing for state jury involvement. Bayer’s CEO welcomed the decision, citing regulatory clarity and reduced litigation costs. The ruling highlights ongoing debates about federal versus state authority and corporate responsibility. QUESTION: How might this Supreme Court decision impact public trust in regulatory agencies and companies like Monsanto?