After Trump v. CASA: why the company usually needs to be a party

Employers used to watch big immigration cases and wait: if a court blocked a policy nationwide, everyone benefited. Since June 2025 that is no longer the default, and an employer that wants relief from a policy usually has to be inside the case that wins it.

What the Court held

In Trump v. CASA, Inc., decided on 27 June 2025, the Supreme Court held that universal injunctions, orders protecting non-parties nationwide, likely exceed the equitable authority Congress has given the federal courts. The Court described the modern class action under Rule 23 as the descendant of the old bill of peace, with its requirements of numerosity, common questions, typicality and adequate representation, and said universal injunctions improperly bypass those protections.

In footnote 10 the Court said that nothing in its decision resolved the distinct question whether the Administrative Procedure Act authorises courts to vacate agency action, citing the power to "hold unlawful and set aside" in 5 U.S.C. § 706.

What 2026 showed

Both of the year's largest employer-relevant rulings were vacaturs. The USCIS hold policies were set aside agency-wide, as covered in Dorcas v. USCIS, and the guidance implementing the $100,000 H-1B payment was set aside, as covered in the status of the $100,000 payment. Non-parties benefited because the remedy acted on the policy, not on the plaintiffs. Whether the Supreme Court will accept universal vacatur remains an open question.

What it means for an individual delay case

A delay suit asks a court to order a decision on one petition. Relief of that kind has always been party-specific, which is why the employer, as petitioner, and the employee normally sue together, as described in the I-140 timeline. CASA reinforces the habit: a favourable order in someone else's case does not decide your petition.

The options when a policy, not a queue, is the problem

• Bring your own case, pleading APA claims alongside mandamus. The relationship between the two is explained in APA delay and mandamus and on Mandamus.com's APA versus mandamus page.
• Join or monitor a class action. N600K.com describes a federal class action over N-600K delays, an example of the structure the Court pointed to.
• Consider declaratory relief where the dispute is about what a rule means, as discussed on Mandamus.com's page on mandamus and declaratory judgment.
• Choose the forum with the remedy in mind; see choice of forum.

The basic structure of a delay claim is in the writ of mandamus explained for employers.

Class actions in practice

A class action is not a shortcut. Certification has to be argued and can take months, and the class definition decides who benefits. In a class seeking injunctive or declaratory relief under Rule 23(b)(2), members are generally bound by the result without a right to opt out, so a company whose employees fall within a class should follow the case closely. For an individual petition with a dated consequence, a company's own suit, prepared as described in the evidence file, usually remains the faster route.

Questions

Did CASA end nationwide relief against immigration policies?

It curtailed universal injunctions. It expressly left open whether courts may vacate agency action under the APA, and lower courts continued to do so in 2026.

Does a class action cover my employees automatically?

Only if they fall within the certified class. Read the class definition and check whether opt-in or other steps are required.

Does CASA affect an ordinary delay suit?

Little. A delay suit already seeks relief for the plaintiffs’ own petition.

General information, not legal advice. Rules and processing practice change; verify against the agency's own published figures and take advice on your own facts.