Justice Department files federal complaint to challenge Minnesota climate suit
The Justice Department has taken Minnesota’s climate-deception fight out of state court and into federal court. In a complaint filed May 4, the department asked a federal judge to stop Minnesota from enforcing or continuing its lawsuit against ExxonMobil, Koch Industries, the American Petroleum Institute and Flint Hills Resources, arguing the case crosses into an area controlled by federal law.
Minnesota filed the underlying suit on June 24, 2020, saying the companies misled the public about climate change and the risks tied to fossil-fuel use. The state’s theory is that the case is a standard consumer-protection and deception action. The federal government says it is something else: an attempt to regulate greenhouse-gas emissions through litigation rather than through federal policymaking.
The timing matters. On April 15, 2026, the Minnesota Supreme Court declined review, leaving the state case free to move forward after a stay dissolved. That made discovery the next likely phase in the litigation. The Justice Department’s filing does not end the state case on its own, but it asks the federal court for relief that would keep Minnesota from proceeding under its own theory of the case.
The dispute now turns on a familiar but blunt question: is Minnesota enforcing its consumer laws, or is it trying to set climate policy by another route? The answer will shape not just this case, but how far states can go when they bring climate-related claims against fossil-fuel companies in state court.
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