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:
All Filters
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- Oct 27, 2026
- Consumer Protection
Oregon v. Bessent
AG coalition challenges a Trump administration rule that exempts nearly all businesses from a federal law designed to help law enforcement investigate money laundering, fraud, and tax evasion.Read Lawsuit -
- Oct 15, 2026
- Immigration
- Executive Power
California v. United States Customs and Immigration Enforcement
AG sues to stop federal immigration authorities from conducting arrests in state courthouses.Read Lawsuit -
- Oct 15, 2026
- Democracy Protection/Voting Rights
- Executive Power
AMERICA v. California
The Trump administration sues California following an ultimatum that it segregate over 20,000 alleged noncitizens from the voting rolls within 48 hours of receiving the list of names without evidence that the named people are not eligible voters.Read Lawsuit
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- Oct 9, 2026
- Labor Rights
- Funding Freeze or Conditions
Maryland Department of Labor v. United States
AG coalition sues to reverse the U.S. Department of Labor’s unlawful decision to terminate $45 million dollars intended to modernize the unemployment insurance system technology and implement measures to prevent fraud.Read Lawsuit -
- Oct 2, 2026
- Environment/Climate
- Executive Power
California v. National Highway Traffic Safety Administration
AG coalition sues the National Highway Traffic Safety Administration to block its rule weakening corporate average fuel economy standards for new passenger cars and light trucks.Read Lawsuit -
- Oct 1, 2026
- Immigration
- Executive Power
- Military Occupation of US Cities
United States v. Maryland
The Department of Justice sues the state of Maryland for laws prohibiting federal officers from wearing masks and requiring clearly visible identification.Read Lawsuit -
- Oct 1, 2026
- Environment/Climate
New York v. Environmental Protection Agency
AGs sue the Environmental Protection Agency for dismantling federal greenhouse gas pollution limits for many of the nation’s largest power plants, gutting safeguards that had required coal- and gas-fired power plants to reduce their emissions and curb the pollution fueling the climate crisis.Read Lawsuit -
- Sep 30, 2026
- Funding Freeze or Conditions
California v. Trump
AG coalition sues to block the Trump administration’s unlawful attempt to impound $810 million in congressionally appropriated federal funding.Read Lawsuit -
- Sep 29, 2026
- Immigration
Colorado v. Department of Homeland Security
Colorado AG sues the Department of Homeland Security to block plans to renovate a shuttered former state prison and operate it as a 1,200-bed private immigration detention camp.Read Lawsuit -
- Sep 22, 2026
- Environment/Climate
- Executive Power
California v. Department of the Interior
California AG sues to block the Trump administration’s effort to cause Invenergy to abandon its offshore wind energy lease off of California’s Central Coast and to invest instead in in out-of-state fossil-fuel or geothermal projects.Read Lawsuit