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:
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- Sep 14, 2026
- Immigration
- Executive Power
New York v. Department of Homeland Security
AGs and the governor of Pennsylvania sue the Trump administration to block a new rule dramatically expanding the ability of immigration officials to use participation in public benefits programs as grounds to deny lawful permanent residency.Read Lawsuit -
- Sep 10, 2026
- Immigration
- Education
United States v. District of Columbia
The Department of Justice sues the District of Columbia for laws that provide in-state tuition and financial aid to undocumented students.Read Lawsuit -
- Sep 10, 2026
- Immigration
- Education
United States v. Hawaii
The Department of Justice sues Hawaii for state laws that provide in-state tuition and financial aid to undocumented students.Read Lawsuit -
- Sep 9, 2026
- Environment/Climate
Massachusetts v. U.S. Fish and Wildlife Service
AG coalition sues to block two rules that weaken protections for threatened species and their critical habitats that for decades have automatically protected newly threatened species from being killed, harmed, or harassed.Read Lawsuit -
- Sep 9, 2026
- Environment/Climate
California v. Burgum
AG coalition sues to block a rule declaring that harming a protected area is only illegal if it is a direct, intentional act against an individual animal, leaving habitat destruction completely unregulated even when it kills or injures a species.Read Lawsuit -
- Sep 2, 2026
- LGBTQ Rights
- Healthcare
- Funding Freeze
Illinois v. United States Department of Health and Human Services
AG coalition and the governor of Pennsylvania sue the Trump administration to stop a rule that would ban federal reimbursement for medically necessary care for transgender young people enrolled in Medicaid or the Children’s Health Insurance Program.Read Lawsuit -
- Aug 28, 2026
- Environment/Climate
- Executive Power
California v. Department of the Interior
California AG sues the Trump administration to block its effort to cause Golden State Wind to abandon its offshore wind energy lease in federal waters off of California’s Central Coast and to invest instead in in out-of-state fossil-fuel projects.Read Lawsuit -
- Aug 27, 2026
- Opioid Issue
New Mexico v. Department of Justice
AG sues to obtain Drug Enforcement Administration records on fentanyl distribution in the state.Read Lawsuit -
- Aug 27, 2026
- Immigration
- Education
United States v. Arizona
The Department of Justice sues Arizona for state laws that provide in-state tuition and financial aid to undocumented students.Read Lawsuit -
- Aug 27, 2026
- Immigration
- Education
United States v. Washington
The Department of Justice sues Washington for state laws that provide in-state tuition and financial aid to undocumented students.Read Lawsuit