Friday’s decision limits the circumstances under which the court can issue nationwide injunctions — orders that stop a federal law or policy from being enforced while court battles play out.

Effective immediately, the Trump administration can begin planning for how it would implement an end to birthright citizenship.

In Trump v. CASA, the Supreme Court significantly narrowed federal courts’ power to issue “universal” or “nationwide” injunctions—broad orders that bar the government from enforcing a policy against anyone,