President Donald Trump signed an executive order earlier this year aimed at denying birthright citizenship to the children of illegal aliens.

That order has since been challenged, and although the Supreme Court has not addressed its constitutionality, the justice did hand Trump a major legal victory last week.

Case concerned power of courts to issue nationwide injunctions

As Breitbart noted, lower courts have imposed nationwide injunctions in response to the birthright citizenship order, a tactic which has been used to halt other initiatives undertaken by the Trump administration.

Yet on Friday, America's highest judicial body ruled six to three in in Trump v. Casa that federal judges lack the power to impose such measures.

"Universal injunctions likely exceed the equitable authority that Congress has given to federal courts," Justice Amy Coney Barrett wrote in her majority opinion.

Barrett pointed to the Judiciary Act of 1789 as the legislation which empowers federal courts "to issue equitable remedies."

Universal injunctions "conspicuously nonexistent for most of our Nation's history"

"Though flexible, this equitable authority is not freewheeling. We have held that the statutory grant encompasses only those sorts of equitable remedies 'traditionally accorded by courts of equity' at our country's inception," she recalled.

"We must therefore ask whether universal injunctions are sufficiently 'analogous' to the relief issued 'by the High Court of Chancery in England at the time of the adoption of the Constitution and the enactment of the original Judiciary Act,'" she argued,

"The answer is no: Neither the universal injunction nor any analogous form of relief was available in the High Court of Chancery in England at the time of the founding," Barrett maintained.

"The universal injunction was conspicuously nonexistent for most of our Nation's history. Its absence from 18th- and 19th-century equity practice settles the question of judicial authority," the justice concluded.

Conservative group welcomes ruling

Carrie Severino serves as president of the conservative Judicial Crisis Network, and Breitbart reported that she welcomed Friday's ruling in a statement posted to social media.

The Court has shut the door on the abuse of universal injunctions. Today’s decision is a victory for our constitutional separation of powers.

Justice Alito’s concurrence sounds the alarm that litigants have been attempting to abuse class actions and standing processes as well… pic.twitter.com/YROfX8woE6

— Carrie Severino (@JCNSeverino) June 27, 2025

"The Court has shut the door on the abuse of universal injunctions. Today’s decision is a victory for our constitutional separation of powers," Severino declared.

"Justice Alito’s concurrence sounds the alarm that litigants have been attempting to abuse class actions and standing processes as well and shows that the Court is well aware of the problem and prepared to police those boundaries to shut down judicial activists," she stressed.