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 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
    • Mar 5, 2026
    • Executive Power
    • Consumer Protection

    Oregon v. Trump

    AG coalition plus the governors of Pennsylvania and Kentucky sue the Trump administration for imposing global tariffs that do not fall within the limited circumstances required by the relevant statute.
    Read Lawsuit
    • Feb 23, 2026
    • Immigration
    • Executive Power

    United States v. New Jersey

    The Trump administration sues the state of New Jersey for allegedly obstructing federal immigration enforcement by barring their activities from state-owned property.
    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
    • Oct 29, 2025
    • Executive Power

    Colorado v. Trump

    Colorado AG sues the Trump administration for moving the U.S. Space Command out of Colorado Springs as a punishment to the state for allowing eligible voters to vote by mail.
    Read Lawsuit
    • Oct 16, 2025
    • Environment/Climate
    • Funding Freeze
    • Executive Power

    Maryland Clean Energy Center v. United States

    AGs sue the Trump administration in the Court of Federal claims for the illegal termination of competitive grants under the "Solar for All" zero-emissions technologies program.
    Read Lawsuit
    • Oct 6, 2025
    • Military Occupation of US Cities
    • Executive Power

    Illinois v. Trump

    AG sues over the deployment of Illinois and Texas National Guard into Chicago for unlawful civilian law enforcement purposes.
    Read Lawsuit
    • Sep 28, 2025
    • Military Occupation of US Cities
    • Executive Power

    Oregon v. Trump

    Oregon AG sues to block the Trump administration's unlawful and unconstitutional deployment of the National Guard to engage in civilian law enforcement in Portland.
    Read Lawsuit
    • Sep 4, 2025
    • Executive Power
    • Military Occupation of US Cities

    District of Columbia v. Trump

    D.C. AG sues to stop the illegal deployment of the National Guard, arguing they are engaged in law enforcement activity in clear violation of the Posse Comitatus acts and the constitution.
    Read Lawsuit
    • Aug 15, 2025
    • Executive Power
    • Military Occupation of US Cities

    District of Columbia v. Trump

    D.C. AG sues the Trump administration and the Department of Justice over their takeover of the D.C. Metropolitan Police Department, in violation of the Home Rule Act.
    Read Lawsuit