US President Donald Trump praised the Supreme Court’s recent decision restricting the power of lower courts to impose nationwide injunctions, calling it a “monumental victory” for the Constitution and executive authority. The ruling, delivered on Friday in the case Trump v. CASA, allows his controversial executive order curbing birthright citizenship to take effect in several states, at least temporarily.

The court’s decision marked a significant limitation on lower courts’ ability to block federal policies across the country. The New York Times reported that the ruling enables Trump’s administration to proceed with enforcing the executive order in regions not covered by ongoing legal challenges.

Speaking from the briefing room alongside Attorney General Pam Bondi and Deputy Attorney General Todd Blanche, Trump commended the ruling. “This morning, the Supreme Court has delivered a monumental victory for the Constitution, the separation of powers, and the rule of law,” he said. He further criticized what he called the “radical left judges” who, according to him, attempted to override presidential authority through broad injunctions.

Nationwide injunctions have been used frequently to pause executive actions during Trump’s presidency—25 times between January and April of his term, more than any previous administration, according to data from the Congressional Research Service and Harvard Law Review.

Trump credited the court’s conservative justices, particularly Justice Amy Coney Barrett, who authored the majority opinion. He said the decision will now allow his administration to move forward with several previously stalled policies, including suspending refugee resettlement, blocking sanctuary city funding, and ending federal support for transgender surgeries.

The case centers on Trump’s executive order aimed at ending birthright citizenship, which is granted to anyone born on U.S. soil, regardless of their parents’ immigration status. The right is rooted in the 14th Amendment, ratified after the Civil War.

While the court did not allow the order to be implemented nationwide, it narrowed the scope of existing injunctions. It ruled that Trump’s order could be blocked only in the 22 Democratic-led states and among plaintiffs with standing—such as expectant mothers and immigration groups. Lower courts were instructed to revise their injunctions accordingly and without delay.

The Hill reported that despite this narrowing, the ruling left open the possibility for plaintiffs to seek broader relief through class action lawsuits. Within hours of the decision, three federal judges in Maryland, Massachusetts, and Washington state issued sweeping orders halting the policy’s implementation in response to new filings. A coalition of plaintiffs also urged a Maryland district court to issue broader protections, effectively replicating the impact of a nationwide injunction.

In addition, the American Civil Liberties Union filed a fresh lawsuit Friday aimed at blocking the order’s enforcement. These developments suggest the legal battle over birthright citizenship could quickly return to the Supreme Court.

Though the Trump administration can now begin drafting implementation guidelines, it must wait 30 days before enforcing any denial of citizenship under the executive order, according to The Hill.

Trump v. CASA was among the most closely watched cases of the Supreme Court’s term, which has now concluded. The court will reconvene on October 6.