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:

    • Apr 3, 2026
    • Democracy Protection/Voting Rights
    • Executive Power

    California v. Trump

    AG coalition and Pennsylvania governor Shapiro sue to block President Trump’s mail-in voting executive order.
    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
    • Environment/Climate

    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 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 30, 2026
    • LGBTQ Rights

    United States v. Minnesota Department of Education

    The Department of Justice sues the state of Minnesota for its policy allowing trans female students to play sports with other female students. alleging violations of Title IX.
    Read Lawsuit
    • Mar 24, 2026
    • Military Occupation of US Cities
    • Immigration
    • Executive Power

    Minnesota v. Department of Justice

    AG sues the Departments of Justice and Homeland Security for access to evidence collected by the federal government in relation to the homicide of two Minnesotans by federal immigration agents during the "Operation Metro Surge" deployment of militarized immigration enforcement.
    Read Lawsuit
    • Mar 23, 2026
    • DEI/Civil Rights
    • Funding Freeze
    • LGBTQ Rights
    • Immigration

    Massachusetts v. Department of Agriculture

    AG coalition sues challenging the Trump Administration’s attempt to impose new discriminatory conditions on U.S. Department of Agriculture (USDA) grants that would require federal funding recipients to comply with vague, hateful, and unrelated policies on immigration, gender ideology, transgender athletes, and diversity, equity, and inclusion.
    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 5, 2026
    • Executive Power
    • Consumer Protection

    Oregon v. Trump

    AG coalition plus the governors of Pennsylvania and Kentucky sue the Trump administration for imposing global tariffs that do not fall within the limited circumstances required by the relevant statute.
    Read Lawsuit
    • Mar 2, 2026
    • Funding Freeze
    • Healthcare

    Minnesota v. Oz

    AG Ellison and the Minnesota Department of Human Services (DHS) filed a federal lawsuit against the Centers for Medicare and Medicaid Services and the U.S. Department of Health and Human Services for illegally attempting to withhold $243 million in Medicaid payments from the state of Minnesota.
    Read Lawsuit