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 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
    • Feb 24, 2026
    • Healthcare
    • Executive Power

    Arizona v. Kennedy

    AGs sue the Trump administration over changes that stripped seven childhood vaccines — those protecting against rotavirus, meningococcal disease, hepatitis A, hepatitis B, influenza, COVID-19, and respiratory syncytial virus (RSV) — of their universally recommended status. The lawsuit also challenges Secretary Kennedy's unlawful replacement of the Advisory Committee on Immunization Practices (ACIP).
    Read Lawsuit
    • Feb 11, 2026
    • Funding Freeze
    • Healthcare

    Illinois v. Vought

    AGs sue the Trump administration for illegally planning to cut more than $600 million in Centers for Disease Control and Prevention (CDC) grants that fund essential public health infrastructure, as well as testing and treatment for lethal diseases like HIV.
    Read Lawsuit
    • Jan 13, 2026
    • LGBTQ Rights
    • Funding Freeze
    • DEI/Civil Rights

    New York v. Department of Health and Human Services

    AGs sue the Trump administration for unlawfully conditioning hundreds of billions of dollars in federal funding on states’ agreement to discriminate against transgender people.
    Read Lawsuit
    • Jan 8, 2026
    • Funding Freeze
    • Healthcare
    • Executive Power

    New York v. Administration for Children and Families

    AGs sue the Trump administration for unlawfully freezing $10 billion in federal funds designated for food, housing, and child care as punishment for the states’ political leadership.
    Read Lawsuit
    • Dec 23, 2025
    • LGBTQ Rights

    Oregon v. Kennedy

    AGs filed a complaint challenging the HHS declaration that claims gender-affirming care fails to meet professionally recognized standards of care and therefore HHS can disqualify doctors or hospitals providing such care from Medicare and Medicaid.
    Read Lawsuit
    • Sep 26, 2025
    • Education
    • LGBTQ Rights
    • Reproductive Rights

    Washington v. Department of Health and Human Services

    AGs sue the Department of Health and Human Services over the federal government's plan to force states to rewrite sexual education curriculum in a way that erases transgender, gender-diverse youth, and youth with differences in sex development.
    Read Lawsuit
    • Jul 29, 2025
    • Healthcare
    • Reproductive Rights

    California v. Department of Health and Human Services

    AGs sue to block the unconstitutional "Defund Provision" of the 2025 reconciliation law that forbids states from using Medicaid dollars to pay for healthcare services provided at Planned Parenthood health centers.
    Read Lawsuit
    • Jul 21, 2025
    • Immigration
    • Executive Power
    • Privacy/Technology

    New York v. Department of Justice

    AGs sue to block restrictions, issued without notice, requiring immigration status verification before public services like Head Start, Meals on Wheels, and domestic violence shelter can be provided to individuals.
    Read Lawsuit
    • Jul 17, 2025
    • Healthcare

    California v. Centers for Medicare and Medicaid Services

    AGs sue to block new Trump administration rules governing the Affordable Care Act that could cost up to 1.8 million people their health insurance.
    Read Lawsuit