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:

    • Jun 2, 2026
    • Environment/Climate
    • Funding Freeze
    • Executive Power

    New York v. Department of the Interior

    AG coalition sues the Department of the Interior over its unlawful settlement with TotalEnergies, under which TotalEnergies would cancel two offshore wind leases in exchange for hundreds of millions of dollars in taxpayer funds.
    Read Lawsuit
    • May 27, 2026
    • Executive Power

    United States v. Massachusetts

    The United States Department of Justice sues the state of Massachusetts for denying confidential license plates to federal agents.
    Read Lawsuit
    • May 27, 2026
    • Executive Power

    United States v. Oregon

    The United States Department of Justice sues the state of Oregon for denying confidential license plates to federal agents.
    Read Lawsuit
    • May 27, 2026
    • Executive Power

    United States v. Washington

    The United States Department of Justice sues the state of Washington for denying confidential license plates to federal law enforcement.
    Read Lawsuit
    • May 27, 2026
    • Executive Power

    United States v. Maine

    The United States Department of Justice sues Maine for denying confidential license plates to federal agents.
    Read Lawsuit
    • May 19, 2026
    • Consumer Protection
    • Executive Power

    United States v. Minnesota

    The Commodity Futures Trading Commission sues Minnesota for banning prediction markets.
    Read Lawsuit
    • 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
    • May 8, 2026
    • Immigration

    United States v. New Mexico

    The Department of Justice sues the state of New Mexico, challenging a state law that bars federal government use of local government property to carry out immigration enforcement and requiring private businesses to tip off illegal aliens about immigration enforcement activities.
    Read Lawsuit
    • May 6, 2026
    • Gun Safety

    United States v. Colorado

    The United States Department of Justice sues the state of Colorado, challenging their large-capacity magazine limit law.
    Read Lawsuit
    • May 4, 2026
    • Environment/Climate

    United States v. Minnesota

    The Department of Justice sues Minnesota over its attempt to regulate global greenhouse gas emissions.
    Read Lawsuit