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:

    • 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 24, 2026
    • Immigration

    Michigan v. Department of Homeland Security

    Michigan AG and the City of Romulus sue the U.S. Department of Homeland Security and U.S. Immigration and Customs Enforcement challenging its plan to convert a Romulus warehouse into a mass immigration detention facility.
    Read Lawsuit
    • Mar 23, 2026
    • Environment/Climate
    • Executive Power

    California v. Wright

    California AG sues the U.S. Department of Energy, challenging Secretary Chris Wright’s “Pipeline Capacity Prioritization and Allocation Order” and seeking to halt its use as the basis for Sable Offshore Corp.’s (Sable) unlawful restart of two California onshore oil pipelines that are subject to State regulation and oversight, illegally superseding state law, state court orders, and a federal court-approved Consent Decree.
    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 20, 2026
    • Immigration

    New Jersey v. Immigration and Customs Enforcement

    New Jersey and the Township of Roxbury sue U.S. Immigration and Customs Enforcement and the U.S. Department of Homeland Security to halt their illegal plan to convert a vacant warehouse into a large-scale immigration detention facility.
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    • Mar 19, 2026
    • Environment/Climate

    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 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
    • Environment/Climate

    Colorado v. United States Department of Energy

    AG files a petition 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
    • Mar 16, 2026
    • DEI/Civil Rights
    • Funding Freeze

    Illinois v. Department of Housing and Urban Development

    AG coalition sues the Trump administration over guidance it issued that significantly weakens fair housing protections and makes it harder to hold landlords accountable for discrimination.
    Read Lawsuit
    • Mar 12, 2026
    • Environment/Climate

    United States v. California Air Resources Board

    The US Department of Justice sues the California Air Resources Board for adopting fuel economy standards that are stricter than federal standards.
    Read Lawsuit
    • Mar 11, 2026
    • Education
    • Funding Freeze

    Massachusetts v. Department of Education

    AG coalition sues the Trump Administration for demanding that higher education institutions provide detailed data on students that would jeopardize their privacy as well as leave institutions vulnerable to inadvertent errors and unreliable data, which could lead to costly penalties and baseless investigations into their practices.
    Read Lawsuit