Monsanto owner Bayer AG on Monday filed a petition with the U.S. Supreme Court, seeking the high court’s review of one of its trial losses in the nationwide Roundup cancer litigation.

The move is widely seen as Bayer’s best hope for putting an end to claims that exposure to Monsanto’s glyphosate-based herbicides, such as the popular Roundup brand, cause non-Hodgkin lymphoma, and the company failed to warn users of the risks. The company has thus far lost three out of three trials, and there are currently more than 100,000 existing plaintiffs as well as many more potential future plaintiffs expected to bring similar claims. Bayer has been trying to settle the cases and come up with a plan to limit, block or settle future claims.

Bayer’s writ of certiorari  asks the court to review the Ninth Circuit Court of Appeals’ decision in the case of Hardeman v. Monsanto. 

During the month-long trial in 2019, lawyers for plaintiff Edwin Hardeman presented jurors with a range of scientific research showing cancer connections to Monsanto’s herbicides as well as evidence of many Monsanto strategies aimed at suppressing the scientific information about the risks of its products. Internal Monsanto documents showed the company’s scientists had engaged in secretly ghost-writing scientific papers that the company then used to help convince regulators of product safety.

The plaintiffs’ attorneys argued that Monsanto should have warned consumers about the risks that its products could cause cancer. Lawyers in the other trials Monsanto lost presented similar arguments and evidence of cancer risk.

FIFRA fight

Bayer has said it hopes the Supreme Court will agree with Bayer’s position that the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA), which governs the registration, distribution, sale, and use of pesticides in the United States, preempts those “failure-to-warn” claims that are central to the Roundup lawsuits. Because the Environmental Protection Agency (EPA) has approved labels with no cancer warning, the failure-to-warn claims should be barred, the company maintains.

The petition filed Monday urges the Supreme Court to review the Ninth Circuit Court of Appeals’ decision upholding the Hardeman trial loss on the grounds that FIFRA preempts a state-law failure to-warn claim “where the warning cannot be added to a product without EPA approval and EPA has repeatedly concluded that the warning is not appropriate.”

The petition also asks the court to address whether or not the Ninth Circuit’s standard for admitting expert testimony “is inconsistent with this Court’s precedent and Federal Rule of Evidence 702.” Bayer argues that the admission of expert testimony in the Hardeman case “departed from federal standards, enabling plaintiff’s causation witnesses to provide unsupported testimony on the principal issue in the case, Roundup’s safety profile.”

In its petition, Bayer argues: “The Ninth Circuit’s errors mean that a company can be severely punished for marketing a product without a cancer warning when the near-universal scientific and regulatory consensus is that the product does not cause cancer, and the responsible federal agency has forbidden such a warning.”

Hardeman lawyer Aimee Wagstaff said her legal team had been preparing for Bayer’s bid for Supreme Court review.

“While paying out billions of dollars to settle claims, Monsanto continues to refuse to pay Mr. Hardeman’s verdict.  That doesn’t seem fair to Mr. Hardeman.  Even so, this is Monsanto’s last chance Hail Mary,” Wagstaff said.”We are eager and ready to beat Monsanto at the Supreme Court and put this baseless preemption defense behind us once and for all.”

Bayer cites broad impact

The petition states that the decision in the Hardeman case, which was part of the multidistrict litigation handled in federal court, will “undoubtedly influence still others pending across the country.”

Bayer said in a statement: “The Petition underscores that consistent regulatory assessments in the U.S. and worldwide, and the overwhelming weight of scientific evidence, support the conclusion that glyphosate-based herbicides are safe and not carcinogenic. In light of the EPA’s approval of the Roundup label without a cancer warning, any state-law failure-to-warn claims premised on such warning would plainly conflict with federal law and thus are preempted. Courts across the U.S. have divided on this basic question of when federal law preempts state law, which makes review by the U.S. Supreme Court both important and necessary. Indeed, it has been 16 years since the Supreme Court ruled on FIFRA preemption, and the prior case did not involve a warning that EPA had rejected.”

Lawyers for Hardeman did not respond to a request for comment.

Bayer has so far said it has earmarked more than $16 billion toward settling the Roundup litigation.