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:

    • Apr 24, 2026
    • Executive Power
    • Consumer Protection
    • Privacy/Technology

    United States v. New York

    The Commodity Futures Trading Commission sues the state of New York to preempt their attempted regulation of prediction markets.
    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
    • Apr 24, 2026
    • Immigration

    Arizona v. Mullin

    Arizona AG sues the Department of Homeland Security and Immigration and Customs Enforcement to stop them from converting a vacant warehouse into an immigrant detention facility in the city of Surprise, AZ.
    Read Lawsuit
    • Apr 13, 2026
    • Immigration

    United States v. Connecticut

    The United States government sues Connecticut, Governor Lamont, Attorney General Tong, the City of New Haven, and Mayor Elicker to challenge the State’s and City’s sanctuary policies.
    Read Lawsuit
    • Apr 3, 2026
    • Democracy Protection/Voting Rights
    • Executive Power

    California v. Trump

    AG coalition and Pennsylvania governor Shapiro sue to block President Trump’s mail-in voting executive order.
    Read Lawsuit
    • Apr 2, 2026
    • Consumer Protection
    • Executive Power

    United States v. Hobbs

    The Commodity Futures Trading Commission sues the state of Arizona for attempting to regulate prediction markets, claiming the federal government has sole power to do so.
    Read Lawsuit
    • Apr 2, 2026
    • Petition for Review

    Minnesota v. Department of Energy

    AGs of Minnesota and Illinois challenge the Trump Administration's unlawful order that would halt the retirements of costly coal units at the F.B. Culley (Culley) generating station in Newburgh, Indiana, despite the power plant needing significant and expensive maintenance to do so.
    Read Lawsuit
    • Apr 2, 2026
    • Consumer Protection
    • Executive Power

    United States v. Illinois

    The Commodity Futures Trading Commission sues the state of Illinois for attempting to regulate prediction markets, claiming the federal government has sole power to do so.
    Read Lawsuit
    • Apr 2, 2026
    • Consumer Protection
    • Executive Power

    United States v. State of Connecticut

    The Commodity Futures Trading Commission sues the state of Connecticut for attempting to regulate prediction markets, claiming the federal government has sole power to do so.
    Read Lawsuit
    • Apr 2, 2026
    • Environment/Climate

    Minnesota v. Wright

    AGs of Minnesota and Illinois challenge the Trump Administration's unlawful order that would halt the retirements of costly coal units at the R.M. Schahfer power plant in Wheatfield, Indiana, despite the power plant needing significant and expensive maintenance to do so.
    Read Lawsuit