The Supreme Court ruled 7-2 on Thursday that Monsanto cannot be sued in state courts for failing to warn consumers that its Roundup weedkiller may cause cancer, a decision that drew immediate fury from Make America Healthy Again activists who say the Trump administration sold them out by backing the pesticide giant.

The ruling held that federal pesticide regulations, which do not require a cancer warning on Roundup's label, preempt state-level failure-to-warn lawsuits. The EPA found in 2020 that glyphosate, Roundup's active ingredient, is unlikely to be carcinogenic, and the Court said pesticide makers are only required to list health impacts formally recognized by the agency.

For the loose coalition of health-focused voters who rallied behind Robert F. Kennedy Jr.'s crusade against glyphosate, the decision landed as a direct rebuke, made worse by the fact that the Department of Justice argued on Monsanto's side.

The case and the ruling

The case centered on John Durnell, a Missouri man who sued Monsanto in 2019, alleging that two decades of Roundup use caused his non-Hodgkin lymphoma. A jury sided with Durnell in 2023. Newsmax reported that the jury awarded Durnell $1.25 million, a verdict the Supreme Court has now overturned.

The legal question was narrow but consequential: does the Federal Insecticide, Fungicide, and Rodenticide Act preempt state-court claims that Monsanto should have added a cancer warning the EPA never required? Seven justices said yes.

The two dissenters made for an unusual pairing. AP News reported that Justice Ketanji Brown Jackson was joined by Justice Neil Gorsuch, a left-right combination that underscored the cross-ideological nature of the controversy.

Durnell himself grasped the scope of the loss. "There are thousands of cases that are like mine that will not see court now. So that is the biggest disappointment for me," he told AP.

The ruling's reach is enormous. Bayer, which acquired Monsanto, faces roughly 200,000 Roundup-related claims and has already paid about $10 billion to settle most pre-2020 lawsuits, the New York Post reported. The company had previously asked the Court to take up a similar case in 2022 and was turned down. This time, with the Trump administration's solicitor general filing a brief in Bayer's favor, the justices agreed to hear the appeal, and delivered the outcome Bayer wanted.

The DOJ's role, and the backlash

What infuriated MAHA activists was not just the ruling itself but the administration's fingerprints on it. The Department of Justice argued before the Court that companies should be shielded from state failure-to-warn suits when they comply with federal labeling requirements. The administration also signed an executive order aimed at boosting glyphosate production.

That posture put the White House directly at odds with the health-first voters Kennedy brought into the coalition. David Murphy, founder of United We Eat and former finance director of Kennedy's presidential campaign, did not hold back in an interview reported by NewsNation:

"A lot of MAHA voters are realizing they've been snookered, they've been had by Republicans that had no intention of protecting their health. It's just a talking point that they added."

Murphy went further, warning of political consequences: "Certain MAHA supporters are not going to turn out, and others are going to actively be voting Democrat."

Kelly Ryerson, a MAHA influencer known online as "Glyphosate Girl," said the Trump administration deserved "100 percent" of the blame because the Justice Department backed Monsanto. Her assessment of the path forward was bleak:

"Going forward, I don't even know at this point what you could do to make up for the fact that the Supreme Court ruling happened."

The Supreme Court has been active this term across a range of high-profile disputes. The same Court recently handed the Trump administration major immigration wins on TPS and asylum processing, rulings that drew praise from the right. The Monsanto decision, by contrast, split the administration's own base.

Kennedy's awkward position

No figure sits more uncomfortably at the center of this than HHS Secretary Robert F. Kennedy Jr. Before joining the administration, Kennedy spent years as an environmental lawyer fighting glyphosate. In 2018, he won a case against Monsanto on behalf of a groundskeeper who alleged Roundup contributed to his cancer. He has repeatedly said he believes glyphosate causes cancer.

Yet after entering government, Kennedy fell in line. He defended the executive order aimed at boosting glyphosate production and the White House's official backing of Monsanto in the Supreme Court case. Only after coming under fire from MAHA activists did he eventually shift his tone to express disagreement with the administration's moves.

In April, the White House tried to smooth things over. President Trump, Kennedy, and high-level administration officials held a private meeting with MAHA activists to hear complaints and ease tensions. A MAHA-led coalition also rallied outside the Supreme Court during oral arguments.

None of it changed the outcome. The justices appeared divided during those arguments, with Justice Brett Kavanaugh showing sympathy toward Bayer's federal preemption argument while Justice Jackson expressed skepticism about the adequacy of the EPA's review process, the Washington Examiner reported. In the end, the preemption argument carried the day in a lopsided 7-2 decision.

The Court has shown willingness to issue broad rulings this term on other fronts as well. It recently struck down Hawaii's concealed carry restriction in a 6-3 ruling, another case where the justices moved decisively on a contested question.

Legislative pushback from both parties

The ruling prompted immediate legislative responses from both sides of the aisle. Sen. Cory Booker, a New Jersey Democrat, announced he would introduce an amendment to the Senate farm bill to strip pesticide companies of the liability protection the Court just affirmed.

"I am going to lead an amendment to strip away this preemptive authority and return it to the people.... we did it in the House, we can do it in the Senate."

Rep. Anna Paulina Luna, a Florida Republican, posted her own response on X: "After today's Supreme Court ruling in favor of Monsanto I will officially be introducing legislation stripping pesticide companies of any liability protections for the harm their products cause the American people." Luna had previously led a House effort to strip pesticide protection language from the farm bill.

The bipartisan nature of the pushback is notable. Just The News reported that some Republican state attorneys general had supported the plaintiffs' side of the case, a sign that the preemption question cuts across normal partisan lines. Nearly seven in ten Americans support greater pesticide restrictions, the Washington Examiner noted, making this a rare issue where populist energy runs against corporate legal strategy.

The Court's immigration decisions this term, including a ruling that asylum seekers must set foot on U.S. soil before claiming protection, have generally reinforced the administration's enforcement priorities. The Monsanto case is the exception, and it exposed a fault line the administration had managed to paper over for months.

Bayer celebrates, critics warn

Bayer wasted no time framing the decision as vindication. A company spokesperson called glyphosate "the most studied crop protection tool in the world" and said the ruling "restores the regulatory clarity that the agricultural sector, the broader food supply chain, and American consumers deserve." Bayer CEO Bill Anderson had previously argued that "companies should not be punished under state laws for complying with federal warning label requirements."

Not everyone in the health policy space was sympathetic to MAHA's outrage. Ken Cook, head of the nonprofit Environmental Working Group, said he was not surprised by the outcome and offered a pointed assessment of the movement's expectations.

"Have no one to blame but themselves for their sense of betrayal."

Cook added that Trump "said the word pesticides a few times, but to think that that meant a change in the core conservative position on environmentalism? It's naive."

Vin Gupta, a pulmonologist who spoke at a press briefing following the ruling, framed the issue as a test of the MAHA movement's credibility:

"If Make America Healthy Again is going to mean anything, it has to apply consistently, not just when it's politically convenient, but also when powerful political interests and corporate interests are involved as well."

The Court also recently cleared the way for border agents to deny re-entry to green card holders accused of crimes, another case where federal authority prevailed over individual claims. The Monsanto ruling follows the same structural logic: federal regulatory determinations override state-level alternatives. Whether that logic serves the public interest depends on whether you trust the EPA's 2020 finding that glyphosate is unlikely to cause cancer.

The real question

The Supreme Court resolved the legal question cleanly. Federal law preempts state failure-to-warn claims when the EPA has not required a cancer warning. Seven justices agreed.

But the political question is messier. The MAHA movement staked its credibility on the promise that this administration would take on the chemical and food industries. The DOJ's decision to argue for Monsanto, and the executive order boosting glyphosate production, made that promise harder to defend. Kennedy's own evolution from courtroom crusader to administration loyalist and back again only sharpened the contradiction.

Whether Luna's and Booker's legislative efforts gain traction remains to be seen. Congress has a long history of talking about stripping corporate liability protections and then quietly moving on.

Voters who care about what's in their food and on their fields now know where the legal lines are drawn. The question is whether the politicians who courted them plan to redraw those lines, or just keep talking about it.