TBA Law Blog


Posted by: Azya Thornton on Jun 29, 2026

The U.S. Supreme Court has made it more difficult for Tennesseans to sue the maker of Roundup for failing to warn consumers that the weedkiller could cause cancer, according to WKRN. In a 7-2 decision issued last week, the court sided with Monsanto, ruling that federal law preempts state law. Writing for the majority, Justice Brett Kavanaugh said Monsanto cannot be held liable under state law for failing to include a cancer warning label when federal law requires the company to use an Environmental Protection Agency-approved label that does not contain such a warning. The decision comes months after Tennessee lawmakers considered legislation that would have protected pesticide manufacturers from similar failure-to-warn lawsuits so long as product labels were approved by the EPA. The ruling could affect hundreds of pending claims against Monsanto, according to the news station. Monsanto has long maintained that Roundup does not cause cancer.