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 10, 2026
    • Immigration

    Maryland v. Lyons

    Maryland AG Brown sued Immigration and Customs Enforcement and the Department of Homeland Security, seeking their compliance with the AG’s administrative subpoena for records related to reported dangerous, inhumane, and unlawful conditions in ICE “hold rooms” at the George H. Fallon Federal Building in the city of Baltimore.
    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 23, 2026
    • Immigration
    • Executive Power
    • Military Occupation of US Cities

    Maryland v. Noem

    AG Brown sues the Trump administration to stop the Department of Homeland Security and ICE from converting a warehouse into a massive immigrant detention facility without proper oversight, reviews, or permits.
    Read Lawsuit
    • Jan 12, 2026
    • Immigration
    • Military Occupation of US Cities
    • Executive Power

    Illinois v. Department of Homeland Security

    Illinois AG sues the Trump administration for deploying immigration enforcement agents to engage in unconstitutional raids and indiscriminate violence against residents in Chicago and across Illinois.
    Read Lawsuit
    • Jan 12, 2026
    • Immigration
    • Executive Power
    • Military Occupation of US Cities

    Minnesota v. Noem

    Minnesota AG sues the Trump administration over the surge of immigration enforcement personnel conducting militarized raids and illegal stops and arrests in the Twin Cities area.
    Read Lawsuit
    • Dec 22, 2025
    • Immigration

    United States v. Illinois

    The Trump administration sues the state of Illinois over state laws that allow for civil liability and punitive damages against immigration enforcement agents when they violate individuals' constitutional rights while engaged in federal immigration enforcement and bans "civil arrests" within 1,000 feet of a courthouse.
    Read Lawsuit
    • Dec 12, 2025
    • Immigration

    California v. Noem

    AGs sue the Trump administration for imposing a $100,000 supplemental fee on H-1B visa petitions.
    Read Lawsuit
    • Nov 20, 2025
    • Executive Power
    • Immigration

    United States v. Newsom

    The Trump administration sues California over a state law allowing undocumented students to pay in-state tuition for college.
    Read Lawsuit
    • Nov 17, 2025
    • Military Occupation of US Cities
    • Immigration

    United States v. California

    The Trump administration sues California over its "mask ban", forbidding any law enforcement authorities from wearing masks or engaging in law enforcement activities without identifying themselves.
    Read Lawsuit
    • Nov 4, 2025
    • Executive Power
    • Funding Freeze
    • Immigration

    Michigan v. Noem

    AGs sue the Department of Homeland Security and FEMA for imposing unlawful conditions on grants and imposing new barriers to states accessing emergency management dollars, disaster relief, and funds for police and emergency response personnel.
    Read Lawsuit