Trump v. Hawaii
The Supreme Court upheld President Trump's travel ban restricting entry from several countries, ruling that a federal immigration law gave the President broad authority to suspend entry of foreign nationals he finds detrimental to U.S. interests, and that the ban did not violate the Establishment Clause.
The 5-4 decision rejected challenges from Hawaii, individuals with relatives affected by the ban, and a Muslim organization, finding the policy had a legitimate national-security justification despite the President's past statements about a 'Muslim ban.' The Court also formally disavowed Korematsu v. United States.
How it got here: A federal trial court blocked the ban; the Ninth Circuit affirmed; the government asked the Supreme Court to review and reverse.
The Case in Depth
What happened
After a review process, President Trump issued a proclamation restricting entry of nationals from eight countries whose governments, the administration said, failed to share adequate information to vet travelers. Hawaii, three individuals with relatives from the covered countries, and a Muslim association sued, arguing the ban exceeded the President's immigration authority and was really aimed at excluding Muslims, violating the Constitution's ban on religious discrimination by the government.
The question before the Court
Could the President use his immigration powers to bar entry of most travelers from several mostly Muslim-majority countries, or did the ban unlawfully target Muslims?
The Court's answer
The Court ruled that the President acted lawfully. It held that the federal immigration statute gives the President sweeping discretion to suspend entry of any class of foreign nationals whenever he decides their entry would harm U.S. interests, and the President's detailed findings after a worldwide security review satisfied that standard. The Court also rejected the argument that a separate anti-discrimination provision limited this power.
On the constitutional claim, the Court assumed it could look past the policy's neutral wording to check whether it was rationally related to a legitimate goal, and concluded that it was — pointing to exemptions, a waiver program, and the removal of some countries from the list. Despite the President's past statements about banning Muslims, the Court found a sufficient security-based justification and rejected the challenge, while stressing it was not endorsing the wisdom of the policy.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
The ruling let the government continue restricting travel from Iran, Libya, North Korea, Somalia, Syria, Venezuela, and Yemen, affecting families seeking to reunite, students, and travelers from those countries. It also confirmed that presidents have very broad power to restrict entry based on nationality for foreign-policy or security reasons, shaping future immigration and national-security policy.
What changes now
The case returns to the lower courts for further proceedings, though the preliminary injunction blocking the policy is dissolved, allowing the travel restrictions to remain in effect. The decision is a final ruling on the merits of the preliminary-injunction request, not a one-time emergency order, though litigation over other aspects of the policy could continue below. The Court's formal disavowal of Korematsu stands as a lasting legal statement independent of the immigration ruling.
What this does not decide
The Court did not decide that the policy is wise, effective, or free of any connection to the President's prior statements about Muslims — only that plaintiffs had not shown a likelihood of success on their legal claims. It also left open how courts should evaluate the nationwide scope of injunctions in future cases.
Concurrences and dissents
Concurrence — Justice Kennedy
Justice Kennedy joined the Court's opinion in full but wrote separately to stress that officials are never free to disregard the Constitution merely because their actions escape judicial review. He emphasized that even broad executive discretion in foreign affairs must be exercised consistently with constitutional guarantees like religious liberty.
Concurrence — Justice Thomas
Justice Thomas agreed with the majority but argued the statute gives no judicially enforceable limits at all and that the President has inherent authority to exclude aliens. He devoted most of his opinion to arguing that nationwide ('universal') injunctions like the one issued below are likely beyond the historical equitable powers of district courts.
Dissent — Justice Breyer
Justice Breyer argued the case turned on whether the policy's waiver and exemption system was being applied as written; if it was, that would support the security rationale, but evidence suggested waivers were rarely granted and might be 'window dressing.' He would have sent the case back to the district court to develop this evidence rather than deciding it now, and would have kept the injunction in place.
Dissent — Justice Sotomayor
“Based on the evidence in the record, a reasonable observer would conclude that the Proclamation was motivated by anti-Muslim animus.”Sotomayor's central objection that the travel ban was really aimed at Muslims.
Justice Sotomayor argued that a reasonable observer, considering the President's many statements about banning Muslims both before and after taking office, would conclude the policy was motivated by anti-Muslim animus rather than genuine security concerns. She argued the majority applied too lenient a standard, ignored the record, and that the case closely resembled the discredited reasoning of Korematsu.
How the Court got there
The legal reasoning, step by step
- The Court read the immigration statute's suspension provision as granting the President very broad discretion — the only requirement is that he 'find' that admitting certain foreign nationals would be detrimental to U.S. interests, with few limits on whom, for how long, or on what terms he may restrict entry.
- It found that requirement met because the President ordered a comprehensive multi-agency review of every country's information-sharing practices before issuing detailed findings identifying specific deficiencies justifying the restrictions.
- The Court rejected arguments that the immigration statute's broader structure, or a separate provision barring nationality-based discrimination in visa issuance, implicitly limited the President's suspension power, reasoning that visa issuance and admissibility are different steps in the process governed by different provisions.
- Turning to the Establishment Clause claim (the constitutional rule against government favoring or disfavoring particular religions), the Court applied a highly deferential approach used in cases about admitting foreign nationals, assuming for the sake of argument that it could consider evidence beyond the policy's neutral text through rational-basis review — asking only whether the policy is plausibly tied to a legitimate objective.
- Applying that lenient test, the Court concluded the policy could reasonably be understood as resting on national-security concerns independent of religious animus, pointing to the policy's exemptions, waiver process, and periodic removal of countries from the list as evidence of a legitimate, non-religious rationale.
- Because the plaintiffs could not show a likelihood of success on either the statutory or constitutional claims, the Court found the lower court had abused its discretion in issuing a preliminary injunction blocking the policy nationwide.
Doctrinal impact
Cases affected by this decision
Overrules Korematsu v. United States (323 U. S. 214)
The Court formally declared the WWII Japanese-American internment decision wrong and no longer valid law.
Reaffirms Sale v. Haitian Centers Council, Inc. (509 U. S. 155)
The Court relied on this case as confirming the President's broad power to restrict entry of aliens.
Reaffirms Kleindienst v. Mandel (408 U. S. 753)
The Court applied this case's deferential standard for reviewing visa-denial decisions affecting citizens.