State Attorney General Federal Litigation Tracker

Case Status Key: Successfully Blocked Case Pending Policy Allowed

Case Name / Matter Date Filed Matter Summary Category Lead States
AG Posture: Plaintiff
Illinois v. Environmental Protection Agency March 31, 2026 AGs and local governments filed a petition for review challenging the Trump Administration’s repeal of the 2024 Mercury and Air Toxics Standards (MATS) Rule that implemented nationwide standards that limit emissions of toxic air pollutants from coal- and oil-fired power plants, including mercury, arsenic, lead and other toxic metals, in addition to acid gases, such as hydrogen chloride and formaldehyde. Executive Power; Environment/Climate Illinois; Minnesota
Massachusetts v. Department of Agriculture March 23, 2026 AG coalition sues challenging the Trump Administration’s attempt to impose new discriminatory conditions on U.S. Department of Agriculture (USDA) grants that would require federal funding recipients to comply with vague, hateful, and unrelated policies on immigration, gender ideology, transgender athletes, and diversity, equity, and inclusion. Immigration; DEI/Civil Rights; Funding Freeze; LGBTQ+ Rights California; Illinois; Massachusetts; Wisconsin
Massachusetts v. Environmental Protection Agency March 19, 2026 AG coalition (including the AG from the U.S. Virgin Islands), the Governor of Pennsylvania, and 10 cities and counties filed a petition challenging the U.S. Environmental Protection Agency’s (EPA) rescission of the Endangerment Finding, EPA’s formal acknowledgement that greenhouse gas emissions from motor vehicles contribute to air pollution that drives climate change and endangers public health and welfare; it has served as the legal basis under the Clean Air Act for limiting climate pollution from vehicles. Environment/Climate California; Connecticut; Massachusetts; New York
Massachusetts v. Department of Education March 11, 2026 AG coalition sues the Trump Administration for demanding that higher education institutions provide detailed data on students that would jeopardize their privacy as well as leave institutions vulnerable to inadvertent errors and unreliable data, which could lead to costly penalties and baseless investigations into their practices. Funding Freeze; Education California; Maryland; Massachusetts
Oregon v. Trump March 05, 2026 AG coalition plus the governors of Pennsylvania and Kentucky sue the Trump administration for imposing global tariffs that do not fall within the limited circumstances required by the relevant statute. Executive Power; Consumer Protection Arizona; California; New York; Oregon
Arizona v. Kennedy February 24, 2026 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). Executive Power; Healthcare Arizona; California
California v. Wright February 18, 2026 AGs sue the Trump administration for terminating congressionally mandated funding for key energy and infrastructure programs. Funding Freeze California; Colorado; Washington
New York v. Department of Health and Human Services January 13, 2026 AGs sue the Trump administration for unlawfully conditioning hundreds of billions of dollars in federal funding on states’ agreement to discriminate against transgender people. DEI/Civil Rights; Funding Freeze; LGBTQ+ Rights New York; Oregon
Oregon v. Kennedy December 23, 2025 AGs filed a complaint challenging the HHS declaration that claims gender-affirming care fails to meet professionally recognized standards of care and therefore HHS can disqualify doctors or hospitals providing such care from Medicare and Medicaid. LGBTQ+ Rights New York; Oregon; Washington
New York v. Vought December 22, 2025 AGs sue to stop the Trump administration from completely defunding the Consumer Financial Protection Bureau. Executive Power; Consumer Protection California; Colorado; New Jersey; New York; Oregon
California v. Department of Transportation December 16, 2025 AGs sue the Department of Transportation for the indefinite suspension of $1.8 billion in electric vehicle charging infrastructure. Funding Freeze; Environment/Climate California; Colorado; Washington
California v. Noem December 12, 2025 AGs sue the Trump administration for imposing a $100,000 supplemental fee on H-1B visa petitions. Immigration California; Massachusetts
New York v. Rollins November 26, 2025 AGs sue the Department of Agriculture for issuing new SNAP guidance that illegally restricts program eligibility for lawful permanent residents. Funding Freeze New York; Oregon
Washington v. United States Department of Housing and Urban Development November 25, 2025 AGs sue the Department of Housing and Urban Development for adopting new policies that limit access to housing funds for people who are transgender, struggling with mental illness or substance use disorder, or live in a jurisdiction with homelessness policy that the federal government disagrees with. Funding Freeze New York; Rhode Island; Washington
Michigan v. Noem November 04, 2025 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. Immigration; Funding Freeze; Executive Power Michigan; Oregon
Massachusetts v. Department of Education November 03, 2025 AGs sue the Department of Education to block a new rule that strips Public Service Loan Forgiveness eligibility from people whose work is disfavored by the Trump administration, including supporting immigrant rights, DEI, and gender-affirming care. Education California; Colorado; Massachusetts; New York
Massachusetts v. United States Department of Agriculture October 28, 2025 AGs sue the Department of Agriculture for its unlawful refusal to fund SNAP benefits during the government shutdown. Funding Freeze; Executive Power Arizona; California; Massachusetts; Minnesota
Maryland Clean Energy Center v. United States October 16, 2025 AGs sue the Trump administration in the Court of Federal claims for the illegal termination of competitive grants under the "Solar for All" zero-emissions technologies program. Funding Freeze; Executive Power; Environment/Climate Maryland
Arizona v. EPA October 16, 2025 AGs sue the Environmental Protection Agency over the unilateral and illegal termination of the "Solar for All" program designed to bring low-cost solar energy to over 900,000 households in low-income and disadvantaged communities. Funding Freeze; Executive Power; Environment/Climate Arizona; Minnesota; Washington; District of Columbia
New York v. Department of Justice October 01, 2025 AGs sue the Department of Justice for illegally withholding legal grant funds because these funds might allegedly be used to help undocumented people secure legal services. Immigration; Funding Freeze; Executive Power Colorado; Illinois; New York; Rhode Island
Oregon v. Trump September 28, 2025 Oregon AG sues to block the Trump administration's unlawful and unconstitutional deployment of the National Guard to engage in civilian law enforcement in Portland. Executive Power; Military Occupation of US Cities California; Oregon
Washington v. Department of Health and Human Services September 26, 2025 AGs sue the Department of Health and Human Services over the federal government's plan to force states to rewrite sexual education curriculum in a way that erases transgender, gender-diverse youth, and youth with differences in sex development. Reproductive Rights; Education; LGBTQ+ Rights Minnesota; Oregon; Washington
New Jersey v. Department of Justice August 18, 2025 AGs sue over a new Department of Justice policy that illegally imposes immigration-enforcement conditions on states receiving Victims of Crime Act (VOCA) funds for programs like emergency shelter, sexual assault forensic exams, funeral services, and other services that help crime victims. DEI/Civil Rights; Funding Freeze; Executive Power; Criminal Justice Reform; Gun Safety California; Delaware; Illinois; New Jersey; Rhode Island
New York v. Department of Energy August 15, 2025 AGs sue the Department of Energy over a new policy that arbitrarily limits federal funding to state energy agencies that operate programs like weatherization and energy assistance programs by capping the sum of indirect costs and fringe benefits to 10% of the award amounts. Funding Freeze; Executive Power; Environment/Climate Colorado; Minnesota; New York; Oregon
California v. Department of Health and Human Services July 29, 2025 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. Reproductive Rights; Healthcare California; Connecticut; New York
California v. Department of Agriculture July 28, 2025 AGs sue the Department of Agriculture over its demand that states turn over personal and sensitive information about millions of Supplemental Nutrition Assistance Program recipients. Immigration; Executive Power; Privacy/Technology California; New York
New York v. Department of Justice July 21, 2025 AGs sue to block restrictions, issued without notice, requiring immigration status verification before public services like Head Start, Meals on Wheels, and domestic violence shelter can be provided to individuals. Immigration; Executive Power; Privacy/Technology New York; Rhode Island; Washington
California v. Centers for Medicare and Medicaid Services July 17, 2025 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. Healthcare California; Massachusetts; New Jersey
Washington v. FEMA July 16, 2025 AGs sue to block FEMA's illegal dismantling of the Building Resilient Infrastructure and Communities disaster preparedness program. Funding Freeze; Executive Power Massachusetts; Washington
California v. McMahon July 14, 2025 AGs sue over funding freeze for programs administered by Department of Education. Funding Freeze; Education California; Colorado; Massachusetts; Rhode Island
California v. Health and Human Services July 01, 2025 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. Funding Freeze; Executive Power; Healthcare; Privacy/Technology California
Washington v. Department of Education June 30, 2025 AGs sue the Department of Education over its unlawful decision to discontinue grants awarded through congressionally established school mental health funding programs. Funding Freeze; Executive Power; Education Washington
New Jersey v. Office of Management and Budget June 24, 2025 AGs sue the Trump administration for unlawfully using an "agency priorities" clause in OMB regulations that the administration claims allows it to cut billions in congressionally appropriated federal funding to critical programs. Funding Freeze; Executive Power Massachusetts; New Jersey; New York
California v. United States June 12, 2025 AGs sue over the Trump administration's unlawful recission of California’s EPA waivers for its fuel vehicle standards, later adopted by the other Plaintiff states. Environment/Climate California; Colorado; Delaware; Massachusetts; New Jersey; New Mexico; New York; Oregon; Rhode Island; Vermont; Washington
New Jersey v. Bondi June 09, 2025 AGs sue to block the Trump administration's decision to reverse a Biden-era ATF rule designating Forced Reset Triggers as "prohibited machine guns" under federal law. Gun Safety Delaware; Maryland; New Jersey
New York v. National Science Foundation May 28, 2025 AGs sue to stop the National Science Foundation's cuts to programs and funding to organizations supporting women, minorities, the disabled, and research into programs studying misinformation and combatting environmental justice. Executive Power Hawaii; New York
California v. Department of Transportation May 13, 2025 AGs sued the Department of Transportation for threatening to cut off billions in transportation funding to states that do not fully comply with the Trump administration's anti-immigrant directives. Immigration; Executive Power California; Illinois; Maryland; New Jersey; Rhode Island
Illinois v. FEMA May 13, 2025 AGs sue FEMA and Department of Homeland Security because of threat to withhold critical federal dollars from states that do not use their local law enforcement resources for federal immigration enforcement. Immigration; Executive Power California; Illinois; New Jersey; Rhode Island
Washington v. Trump May 09, 2025 AGs sue Trump over Executive Order declaring a "national energy emergency" to fast-track permits and approvals for fossil fuel extraction in sensitive areas. Executive Power; Environment/Climate California; Washington
Washington v. Department of Transportation May 07, 2025 AGs sue to challenge the Trump administration's cancellation of funds for electric vehicle charging infrastructure. Executive Power; Environment/Climate California; Colorado; Washington
New York v. Trump May 05, 2025 AGs sue to stop Trump administration's "Wind Directive" canceling all wind energy projects, federal funding, and permitting for such projects, and stopping the wind development energy industry in its tracks. Executive Power; Environment/Climate Massachusetts; New York
New York v. Kennedy, Department of Health and Human Services May 05, 2025 AGs sue to reverse Trump administration's mass termination of 10,000 employees and shuttering of dozens of agencies. Executive Power; Healthcare New York; Rhode Island; Washington
Maryland v. Corporation for National and Community Service (AmeriCorps) April 29, 2025 AGs sue to stop Trump's unilateral dismantling and dissolution of AmeriCorps. Executive Power California; Colorado; Delaware; Maryland
New York v. Department of Education April 25, 2025 AGs sue Trump administration for creating new and onerous conditions on federal education funding via anti-DEI policies and executive orders. DEI/Civil Rights; Executive Power; Education California; Illinois; Massachusetts; Minnesota; New York
Oregon v. Trump April 23, 2025 AGs sue to rein in Trump's tariff actions, citing his imposing, modifying, escalating, and suspending tariffs by EO, memos, social media posts, and agency decrees. Executive Power Oregon
New York v. McMahon April 10, 2025 AGs sue after the Department of Education unilaterally and without notice rescinded education grant funds that were intended to be available through March 2026. Executive Power; Education New York
Rhode Island v. Trump April 04, 2025 AGs sue to stop Trump's Executive Order dismantling and defunding of seven federal agencies, including the Institute of Museum and Library Services. Funding Freeze; Executive Power Hawaii; New York; Rhode Island
Washington v. Trump April 04, 2025 AGs sue to block Trump's Executive Order on elections. Executive Power; Democracy Protection/Voting Rights Oregon; Washington
Massachusetts v. Kennedy, Department of Health and Human Services April 04, 2025 AGs sue to reinstate the National Institutes of Health grants and restore their grant application process. Executive Power; Healthcare California; Maryland; Massachusetts; Washington
Colorado v. Department of Health and Human Services April 01, 2025 AGs sue to block the Department of Health and Human Services' abrupt cancellation of $11 billion in critical public health funding. Funding Freeze; Executive Power; Healthcare California; Colorado; Minnesota; Rhode Island; Washington
New York v. McMahon March 13, 2025 AGs sue to stop Trump's Reduction in Force order that is the alleged first step in the unilateral dismantling of the department. Executive Power; Education California; Hawaii; Massachusetts; New York
Maryland v. Department of Agriculture March 06, 2025 AGs sue to stop Trump administration's mass firing of probationary workers and Reduction in Force orders. Executive Power; Labor Rights Maryland; Minnesota; District of Columbia
New Mexico v. Musk February 13, 2025 AGs sue to challenge the constitutionality of DOGE under the Appointments Clause and Temporary Organization Statute, invoking Major Questions Doctrine. DOGE Arizona; Michigan; New Mexico
Massachusetts v. National Institutes of Health February 10, 2025 AGs sue to stop NIH's funding cuts for indirect grantee and administrative costs. Executive Power Illinois; Massachusetts; Michigan
New York v. Trump February 08, 2025 AGs sue to block DOGE access to the Treasury's Bureau of Fiscal Services, alleging violation of the Administrative Procecure Act and the Privacy Act of 1974. DOGE New York
Washington v. Trump February 07, 2025 AGs sue to block Trump's Executive Order that attempts to cut off federal funding for any healthcare providers that provide gender-affirming care for anyone under the age of 19. LGBTQ+ Rights Washington
New York v. Trump January 28, 2025 AGs sue to halt "Funding Freeze" in Office of Management and Budget Memo issued by Trump administration on January 27, 2025. Funding Freeze; Executive Power California; Illinois; Massachusetts; New Jersey; New York; Rhode Island
Washington v. Trump January 21, 2025 AGs sue to challenge constitutionality of the Birthright Citizenship Executive Order. Immigration Washington
AG Posture: Defendant
AG Posture: Intervenor
AG Posture: Amici
AG Posture: Comments on Rules and Regulations
AG Posture: Guidance
AG Posture: Joint Statements
AG Posture: Letters
AG Posture: Other Actions