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As of July 9, 2026, a ruling handed down almost exactly one year ago continues to reshape how Americans fight back against federal policy overreach — and the legal establishment is still catching up to what it means.
As Google News reported, the Supreme Court's 6-3 decision in Trump v. CASA, Inc. on June 27, 2025 didn't end legal challenges to executive power. It redirected them.
The Decision That Closed One Door
27. That is the total number of nationwide injunctions federal courts issued across the entire twentieth century — a figure then-Attorney General William Barr cited in May 2019 to illustrate how exceptional they once were. By March 2025, the Congressional Research Service had counted 86 during Trump's first term alone, and 28 during Biden's. Then came the first 100 days of Trump's second term: 25 more, before the Supreme Court weighed in.
Writing for a 6-3 majority, Justice Amy Coney Barrett held that universal injunctions — court orders blocking government policies against everyone in the country, not just the plaintiffs who actually sued — exceed the authority Congress granted federal courts under the Judiciary Act of 1789. The statute, Barrett wrote, allows courts to provide "complete relief" to the parties before them. It does not authorize relief for the entire nation.
In plain terms: a single federal judge can no longer issue one order halting a federal policy for 330 million people based on a lawsuit filed by three organizations.
The Door That Opened Within Hours
The ACLU didn't wait for the ink to dry. Hours after the CASA ruling, it filed a class action lawsuit in New Hampshire targeting Trump's birthright citizenship executive order. Less than two weeks later, on July 10, 2025, U.S. District Judge Joseph Laplante provisionally certified a class of all infants affected by that order and issued a class-wide preliminary injunction.
The outcome — a court order blocking a federal policy broadly — looked nearly identical to a nationwide injunction. The procedural path to get there was fundamentally different.
Immigration expert Greg Siskind offered a measured read: "Trump v. CASA is not as big of a win for the administration as I think was predicted at the very beginning. It's basically made it more difficult to get the national relief on the front end in the same timeframe that we were seeing before, but that doesn't necessarily really change the outcome."
Justice Kavanaugh, concurring in the majority, essentially handed plaintiffs a roadmap: file class actions seeking injunctions that could apply "statewide, regionwide, or even nationwide." Litigants followed immediately. Between July and September 2025, federal courts issued class certification decisions in cases challenging birthright citizenship restrictions, the dismantling of USAID, immigrant detention conditions, and research grant terminations.
Why the Numbers Tell a More Complicated Story
Chart: Nationwide injunctions issued per administration, per Congressional Research Service and DOJ data current as of March 2025. Trump's first-term count updated from initial DOJ figure of 55 (February 2020) to 86 by final CRS tally.
The shift matters because class actions under Federal Rule of Civil Procedure 23 carry procedural requirements that nationwide injunctions never did. To certify a class, plaintiffs must demonstrate commonality (shared legal questions across the group), typicality (the named plaintiffs' claims represent the broader class), numerosity (enough class members to make individual suits impractical), and adequate representation. Justice Alito, concurring in CASA, flagged the obvious workaround risk: "today's decision will have very little value if district courts award relief to broadly defined classes without following Rule 23's procedural protections for class certification."
That friction is real and not merely theoretical. Class action defense expert Patricia Brum questioned the practical mechanics: "How are you going to give notice to all the potential class members? How are you even going to identify them?" when using class actions as a constitutional relief mechanism. UCLA law professor David Marcus described the legal landscape as "complicated with a lot of moving parts" as plaintiffs navigate genuinely new procedural terrain.
State attorneys general have also moved into the gap. A favorable ruling for a state effectively protects all its residents, making state-level challenges a functional substitute for some of the coverage that nationwide injunctions previously provided.
Where Legal Technology Enters the Picture
This procedural reshuffling is running straight into a parallel shift in how class action litigation operates. As of July 9, 2026, according to industry survey data, 41% of legal respondents identify AI-enabled product deployments as a primary trigger for new class action lawsuits, and 38% plan to use AI-powered predictive analytics for trial preparation.
That intersection deserves attention. The same AI systems accelerating government and corporate decision-making — automated benefits determinations, algorithmic enforcement, AI-driven policy implementation — are generating the fact patterns that fuel new class actions. And the legal technology platforms now processing those cases are using machine learning to identify common questions across thousands of potential class members, which is precisely the "commonality" showing that Rule 23 requires for certification.
This echoes a pattern AI Trends documented recently around regulatory exposure for AI companies: the procedural walls separating AI deployment from legal liability are narrowing on multiple fronts simultaneously. Legal technology built to surface shared injuries at scale may actually make Rule 23 certification more tractable than the old single-plaintiff nationwide injunction model — though that argument hasn't been tested at scale in federal courts yet.
What This Means If a Federal Policy Affects You
If you believe a federal policy has harmed you, or you've received a notice that you may be part of a class, here is what to understand before you act.
In large class actions challenging federal policies, many class members never receive formal notice — particularly when the affected population is diffuse. If you think a policy applies to your situation, search the case on PACER.gov (the federal court's public docket system) or look for civil rights organizations coordinating outreach for that specific case. Missing a notice deadline doesn't automatically extinguish your claims, but acting earlier preserves more options.
Class actions typically take 2 to 5 years to resolve, with complex discovery and settlement negotiations extending the timeline further. Individual payouts in large federal-policy class actions are often modest. If your specific injury is substantial — a denied federal benefit, a deportation proceeding, a terminated research grant — consult an attorney about whether you have individual claims worth pursuing separately, rather than relying on a class settlement distribution that may arrive years later.
Following CASA, state attorneys general have become more significant players because a ruling in a state's favor protects all residents of that state. If your state's AG has already challenged the same federal policy affecting you, you may benefit from that litigation automatically — no action required on your part. Track active AG challenges through your state attorney general's official website.
Frequently Asked Questions
What is a nationwide injunction and why did the Supreme Court limit it in Trump v. CASA?
A nationwide injunction — also called a universal injunction — is a court order blocking a government policy from being enforced against anyone in the country, not just the plaintiffs who sued. Federal courts issued only 27 of them across the entire 20th century, but the number exploded: 86 during Trump's first term and 28 during Biden's, per the Congressional Research Service. In Trump v. CASA, the Supreme Court's 6-3 majority held on June 27, 2025 that such broad orders exceed the authority the Judiciary Act of 1789 gives federal courts. A court can still grant full relief to the plaintiffs in front of it — it just cannot extend that relief to the entire country based on one small lawsuit.
How does a class action lawsuit work as an alternative to a nationwide injunction after Trump v. CASA?
A class action consolidates many plaintiffs sharing the same legal injury into a single suit. Once a court certifies the class — verifying that it meets Federal Rule of Civil Procedure 23 requirements of numerosity, commonality, typicality, and adequate representation — any injunction applies to all class members. This can achieve the same geographic coverage as a former nationwide injunction. The ACLU demonstrated the model within hours of CASA: it filed a class action in New Hampshire the same day, and on July 10, 2025, U.S. District Judge Joseph Laplante provisionally certified a class of all infants affected by Trump's birthright citizenship order and issued a class-wide injunction.
How long does a class action lawsuit take, and what happens to class members during that time?
Class actions typically take 2 to 5 years to reach resolution, though complex cases with extensive discovery or protracted settlement negotiations can run longer. During that time, class members are generally bound by the litigation unless they formally opt out. If you opt out, you preserve the right to sue individually — potentially for larger damages — but you bear the cost and risk of solo litigation. If the class settles or wins at trial, members who stayed in receive a share of the recovery according to a distribution plan, which a court must approve as fair and adequate before any money changes hands.
Bottom line: The CASA ruling changed the procedural rulebook, not the final score. Courts have shown they can move quickly when the legal questions are sharp — Judge Laplante certified the New Hampshire birthright citizenship class within 13 days of the Supreme Court's ruling. In my read, the longer-term consequence is a legal landscape where organizations with the infrastructure to manage complex Rule 23 proceedings — well-funded civil rights groups, state attorneys general — become dominant challengers, while individual litigants without institutional backing lose some of the leverage that single-judge nationwide injunctions once offered. That concentration of litigation power is the real shift worth watching, and it will take several more years of appellate decisions before we know how durable the class action workaround actually is.
Disclaimer: This article is for informational purposes only and does not constitute legal advice. For guidance specific to your situation, consult a licensed attorney in your jurisdiction. Research based on publicly available sources current as of July 9, 2026.