Ongoing court cases and litigation

State attorneys general play a vital role in bringing litigation that defends the rule of law, protects the rights of residents, and upholds state and federal statutes.  

This page tracks ongoing lawsuits and legal actions led or joined by state AGs against the Trump administration — on topics ranging from civil rights and consumer protection to environmental justice and challenges to federal overreach. Here you’ll find case summaries, court filings, and the latest developments in high-impact litigation that reflect the evolving responsibilities of state attorneys general in today’s legal and political environment. 

Click here to see a full view of the litigation led by Progressive State AGs:

State Attorney General Federal Litigation Tracker

Selected Filters:

    • Jul 21, 2026
    • Environment/Climate
    • Petition for Review

    Massachusetts v. EPA

    AG coalition files a Petition for Review challenging a proposed Environmental Protection Agency rule that would weaken regulations designed to phase out the use of hydrofluorocarbons in commercial equipment.
    Read Lawsuit
    • Apr 2, 2026
    • Petition for Review

    Minnesota v. Department of Energy

    AGs of Minnesota and Illinois challenge the Trump Administration's unlawful order that would halt the retirements of costly coal units at the F.B. Culley (Culley) generating station in Newburgh, Indiana, despite the power plant needing significant and expensive maintenance to do so.
    Read Lawsuit
    • Apr 2, 2026
    • Petition for Review

    Minnesota v. Department of Energy

    AGs of Minnesota and Illinois challenge the Trump Administration's unlawful order that would halt the retirements of costly coal units at the R.M. Schahfer power plant in Wheatfield, Indiana, despite the power plant needing significant and expensive maintenance to do so.
    Read Lawsuit
    • Mar 31, 2026
    • Petition for Review

    Illinois v. Environmental Protection Agency

    AGs and local governments filed a petition for review challenging the Trump Administration’s repeal of the 2024 Mercury and Air Toxics Standards (MATS) Rule that implemented nationwide standards that limit emissions of toxic air pollutants from coal- and oil-fired power plants, including mercury, arsenic, lead and other toxic metals, in addition to acid gases, such as hydrogen chloride and formaldehyde.
    Read Lawsuit
    • Mar 19, 2026
    • Petition for Review

    Massachusetts v. Environmental Protection Agency

    AG coalition (including the AG from the U.S. Virgin Islands), the Governor of Pennsylvania, and 10 cities and counties filed a petition for review challenging the U.S. Environmental Protection Agency’s (EPA) rescission of the Endangerment Finding, EPA’s formal acknowledgement that greenhouse gas emissions from motor vehicles contribute to air pollution that drives climate change and endangers public health and welfare; it has served as the legal basis under the Clean Air Act for limiting climate pollution from vehicles.
    Read Lawsuit
    • Mar 18, 2026
    • Petition for Review

    Colorado v. United States Department of Energy

    AG files a petition for review with the U.S. Court of Appeals for the D.C. Circuit to overturn an illegal emergency order issued by the U.S. Department of Energy requiring the coal-fired Craig Unit 1 in Moffat County to be available until March 30.
    Read Lawsuit
    • Jan 23, 2026
    • Petition for Review

    California v. Pipelines and Hazardous Materials Safety Administration

    California AG files a Petition for Review of a Pipelines and Hazardous Materials Safety Administration federalization order that reopened oil pipelines off the coast without completed repairs and in violation of federal procedures and prior legal agreements.
    Read Lawsuit
    • Sep 25, 2025
    • Petition for Review

    Illinois Office of Attorney General v. Department of Energy

    AGs file Petition for Review challenging the Department of Energy's emergency order keeping open the Eddystone Power Plant outside of Philadelphia.
    Read Lawsuit
    • Jul 25, 2025
    • Petition for Review

    Minnesota v. Wright

    AGs of Minnesota and Illinois challenge the Trump Administration's unlawful order that would halt the retirements of costly coal units at the J.H. Campbell power plant in West Olive, MI despite the power plant needing significant and expensive maintenance to do so.
    Read Lawsuit
    • Jul 24, 2025
    • Petition for Review

    Michigan v. Department of Energy

    Michigan AG files a Petition for Review with the U.S. Court of Appeals for the DC Circuit challenging the U.S. Department of Energy ‘s arbitrary and illegal order forcing the continued operation of Consumers Energy’s J.H. Campbell coal-fired power plant in West Olive, Michigan, under the pretense of a fabricated energy emergency.
    Read Lawsuit