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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- Mar 2, 2026
- Funding Freeze
- Healthcare
Minnesota v. Oz
AG Ellison and the Minnesota Department of Human Services (DHS) filed a federal lawsuit against the Centers for Medicare and Medicaid Services and the U.S. Department of Health and Human Services for illegally attempting to withhold $243 million in Medicaid payments from the state of Minnesota.Read Lawsuit -
- Feb 24, 2026
- Healthcare
- Executive Power
Arizona v. Kennedy
AGs sue the Trump administration over changes that stripped seven childhood vaccines — those protecting against rotavirus, meningococcal disease, hepatitis A, hepatitis B, influenza, COVID-19, and respiratory syncytial virus (RSV) — of their universally recommended status. The lawsuit also challenges Secretary Kennedy's unlawful replacement of the Advisory Committee on Immunization Practices (ACIP).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 -
- Jan 8, 2026
- Funding Freeze
- Healthcare
- Executive Power
New York v. Administration for Children and Families
AGs sue the Trump administration for unlawfully freezing $10 billion in federal funds designated for food, housing, and child care as punishment for the states’ political leadership.Read Lawsuit -
- Jul 29, 2025
- Healthcare
- Reproductive Rights
California v. Department of Health and Human Services
AGs sue to block the unconstitutional "Defund Provision" of the 2025 reconciliation law that forbids states from using Medicaid dollars to pay for healthcare services provided at Planned Parenthood health centers.Read Lawsuit -
- Jul 17, 2025
- Healthcare
California v. Centers for Medicare and Medicaid Services
AGs sue to block new Trump administration rules governing the Affordable Care Act that could cost up to 1.8 million people their health insurance.Read Lawsuit -
- Jul 1, 2025
- Healthcare
- Executive Power
- Funding Freeze
- Privacy/Technology
California v. Health and Human Services
AGs sue the Department of Health and Human Services because it provided unfettered access to individual, confidential personal health data to the Department of Homeland Security for immigration enforcement purposes.Read Lawsuit -
- May 5, 2025
- Healthcare
- Executive Power
New York v. Kennedy, Department of Health and Human Services
AGs sue to reverse Trump administration's mass termination of 10,000 employees and shuttering of dozens of agencies.Read Lawsuit -
- Apr 4, 2025
- Healthcare
- Executive Power
Massachusetts v. Kennedy, Department of Health and Human Services
AGs sue to reinstate the National Institutes of Health grants and restore their grant application process.Read Lawsuit -
- Apr 1, 2025
- Funding Freeze
- Executive Power
- Healthcare
Colorado v. Department of Health and Human Services
AGs sue to block the Department of Health and Human Services' abrupt cancellation of $11 billion in critical public health funding.Read Lawsuit