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:

    • Sep 2, 2026
    • LGBTQ Rights
    • Healthcare
    • Funding Freeze

    Illinois v. United States Department of Health and Human Services

    AG coalition and the governor of Pennsylvania sue the Trump administration to stop a rule that would ban federal reimbursement for medically necessary care for transgender young people enrolled in Medicaid or the Children’s Health Insurance Program.
    Read Lawsuit
    • Aug 27, 2026
    • Education
    • Immigration

    United States v. Oregon

    The Department of Justice sues Oregon for state laws that provide in-state tuition and financial aid to undocumented students.
    Read Lawsuit
    • Aug 27, 2026
    • Reproductive Rights
    • Funding Freeze

    New York v. Department of Health and Human Services

    AGs sue to block new conditions on Title X family planning funds which penalize states and providers that refuse to abandon nondiscrimination protections or conform public family planning programs to the administration's narrow ideological agenda.
    Read Lawsuit
    • Aug 26, 2026
    • Democracy Protection/Voting Rights

    California v. United States Postal Service

    AG coalition and the governor of Pennsylvania sue the United States Postal Service to block a new rule that seeks to usurp states’ control of mail voting in elections by establishing a national voter list and directing the U.S. Postal Service to transmit mail ballots only to voters on the list.
    Read Lawsuit
    • Aug 13, 2026
    • Executive Power
    • Immigration

    Illinois v. Department of Transportation

    AG coalition and the governor of Pennsylvania sue to stop the Department of Transportation from seizing the names, dates of birth, and Social Security numbers of 17 million commercial drivers from a nationwide database.
    Read Lawsuit
    • Aug 13, 2026
    • Immigration
    • Executive Power

    Illinois v. Department of Homeland Security

    AG coalition sues to stop the Department of Homeland Security from seizing the names, dates of birth, and Social Security numbers of 17 million commercial drivers from a nationwide database.
    Read Lawsuit
    • Aug 11, 2026
    • Executive Power

    Oregon v. Office of the Comptroller of the Currency

    AG coalition sues the administration over its attempt to override state laws requiring mortgage lenders to pay homeowners interest on homeowners’ money that lenders hold in escrow for taxes and insurance.
    Read Lawsuit
    • Aug 3, 2026
    • Executive Power
    • Consumer Protection

    Oregon v. Trump

    AG coalition and the governors of Kentucky and Pennsylvania sue the Trump administration for instituting another round of unlawful and arbitrary tariffs, these justified by an alleged desire to reduce forced labor as a pretext for this new illegal tariff scheme.
    Read Lawsuit
    • Aug 3, 2026
    • Funding Freeze
    • Immigration

    New York v. Administration for Children and Families

    AG coalition and the governors of Pennsylvania and Kentucky sue the Trump administration to block a notice relating to the Temporary Assistance for Needy Families program that authorizes the wholesale sharing of recipients’ most sensitive personal information with any federal, state, or private entity, including the Department of Homeland Security.
    Read Lawsuit
    • Jul 31, 2026
    • Healthcare

    California v. Kennedy

    AG coalition and the governor of Pennsylvania file a lawsuit to challenge a federal rule that would illegally undermine the Affordable Care Act and make health insurance more expensive.
    Read Lawsuit