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:

    • Aug 13, 2026
    • Immigration
    • Executive Power

    Illinois v. Department of Homeland Security

    AG coalition sues to stop the Trump administration from seizing the names, dates of birth, and Social Security numbers of 17 million commercial drivers from a nationwide database containing the sensitive personal information of commercial driver's license holders and has threatened to eliminate all federal funding for the system unless the records are turned over by August 17.
    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 23, 2026
    • Funding Freeze
    • Executive Power
    • Immigration
    • Democracy Protection/Voting Rights

    Illinois v. FEMA

    AG coalition files lawsuit challenging the Trump Administration for imposing unlawful conditions on billions of dollars in federal grants that help States and local governments prepare for, protect against, respond to, and recover from catastrophic disasters by requiring States to adopt its preferred policies to receive these grants, including complying with new immigration enforcement mandates, accepting new election administration requirements, and allowing funding to be terminated based on vague and subjective criteria.
    Read Lawsuit
    • 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
    • Jul 7, 2026
    • Funding Freeze
    • Executive Power

    Washington v. Department of Housing and Urban Development

    AG coalition and the governors of Pennsylvania and Kentucky sue the Trump administration to block a cap on funding for permanent housing and set other unlawful conditions on Continuum of Care funds for people experiencing homelessness.
    Read Lawsuit
    • Jun 29, 2026
    • Healthcare

    Massachusetts v. Oz

    AG coalition and the governors of Pennsylvania and Kentucky sue the Trump Administration's over its unlawful implementation of new Medicaid work requirements included in the One Big Beautiful Bill Act, challenging provisions of an interim final rule published by the U.S. Department of Health and Human Services and Centers for Medicare & Medicaid Services.
    Read Lawsuit
    • Jun 10, 2026
    • DEI/Civil Rights
    • Funding Freeze

    Maryland v. Hegseth

    AG coalition sued the Trump administration over the addition of new terms to federal contracts that – in the name of purging “diversity, equity, and inclusion” from federal contracting – impose unclear and confusing requirements on contractors that may depart from antidiscrimination policies that contractors have followed for decades, and threaten severe penalties on federal contractors without adequate notice of what is prohibited.
    Read Lawsuit
    • May 31, 2026
    • Funding Freeze
    • Executive Power

    Renewable Northwest v. Hegseth

    AG coalition files Motion to Intervene in a lawsuit challenging the Department of Defense's unlawful freezing of routine reviews of land-based wind energy projects around the country.
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    • May 19, 2026
    • Education

    Maryland v. Department of Education

    AG coalition sues the U.S. Department of Education over a new rule that unlawfully limits access to federal student loans by narrowing the federal definition of “professional degree” and imposes restrictions Congress did not authorize, unlawfully excluding many degree programs that qualify under the standards established by federal law.
    Read Lawsuit
    • Apr 24, 2026
    • Environment/Climate

    California v. Zeldin

    AG Coalition, along with New York City and Harris County, Texas, sue the Environmental Protection Agency over its failure to implement a life-saving 2024 Clean Air Act rule strengthening national ambient air quality standards (NAAQS) for fine particulate matter (PM2.5), commonly known as soot.
    Read Lawsuit