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
    • 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
    • Jun 23, 2026
    • Executive Power
    • Military Occupation of US Cities
    • Immigration

    New York v. Department of Justice

    AG sues the U.S. Department of Justice in proactive defense of a slate of recently passed state laws that prohibit local, state, and federal law enforcement officers from concealing their identity with masks, requiring all officers to display clear identification, prohibiting local governments and law enforcement agencies from entering into agreements to operate as immigration officers or to detain people solely for federal civil immigration violations, and prohibiting the use of public subsidies for civil immigration detention facilities.
    Read Lawsuit
    • Jun 10, 2026
    • Immigration

    Santa Clara v. United States Customs and Immigration Enforcement

    California AG and Santa Clara County sue to block the illegal development of an Immigration and Customs Enforcement facility in unincorporated Santa Clara County near Gilroy, California.
    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
    • 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 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 24, 2026
    • Immigration

    Michigan v. Department of Homeland Security

    Michigan AG and the City of Romulus sue the U.S. Department of Homeland Security and U.S. Immigration and Customs Enforcement challenging its plan to convert a Romulus warehouse into a mass immigration detention facility.
    Read Lawsuit
    • Mar 24, 2026
    • Military Occupation of US Cities
    • Immigration
    • Executive Power

    Minnesota v. Department of Justice

    AG sues the Departments of Justice and Homeland Security for access to evidence collected by the federal government in relation to the homicide of two Minnesotans by federal immigration agents during the "Operation Metro Surge" deployment of militarized immigration enforcement.
    Read Lawsuit
    • Mar 20, 2026
    • Immigration

    New Jersey v. Immigration and Customs Enforcement

    New Jersey and the Township of Roxbury sue U.S. Immigration and Customs Enforcement and the U.S. Department of Homeland Security to halt their illegal plan to convert a vacant warehouse into a large-scale immigration detention facility.
    Read Lawsuit