Justice Department sues Minnesota to block climate deception case against oil firms
The Justice Department went to federal court on May 4 with a complaint that tries to stop Minnesota from enforcing its climate-deception lawsuit against ExxonMobil, Koch Industries, Flint Hills Resources and the American Petroleum Institute. The filing asks for declaratory and injunctive relief; it does not mean the court has already granted any pause or injunction. DOJ says Minnesota is attempting to regulate global greenhouse gas emissions in an area it views as exclusively federal. ([justice.gov](https://www.justice.gov/opa/pr/justice-department-files-complaint-against-minnesota-over-its-attempt-override-federal-law))
Minnesota’s position is the opposite. The state says its case is about alleged deception and fraud, not an attempt to write energy policy. In its April 17 statement, the attorney general’s office said the Minnesota Supreme Court denied the companies’ petition for review on April 15, after lower courts refused to dismiss the lawsuit. That left the state case on track to move forward in district court. ([ag.state.mn.us](https://www.ag.state.mn.us/Office/Communications/2026/04/17_ExxonKochAPI.asp))
DOJ’s complaint leans heavily on preemption. It argues that federal law, the Constitution and the Clean Air Act bar Minnesota from using state-law claims to reach conduct tied to worldwide emissions and energy production. The government also says the state suit interferes with federal authority over interstate air pollution and foreign affairs. Those are arguments in the filing, not holdings from the federal court. ([justice.gov](https://www.justice.gov/opa/media/1439311/dl))
The practical fight is over who gets to police the alleged harm. Minnesota says the companies misled residents and should answer under state law. The Justice Department says the case is an unlawful attempt to regulate beyond Minnesota’s borders. For now, the federal action adds another layer to a long-running fight over whether climate-related deception claims can survive federal preemption attacks. ([justice.gov](https://www.justice.gov/opa/pr/justice-department-files-complaint-against-minnesota-over-its-attempt-override-federal-law))
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