Chief Justice Roberts Delivered the Opinion of the Court Keeping Limited Travel Ban

Washington, DC…Under the Immigration and Nationality Act, foreign nationals seeking entry into the United States undergo a vetting process to ensure that they satisfy the numerous requirements for admission. The Act also vests the President with authority to restrict the entry of aliens whenever he finds that their entry “would be detrimental to the interests of the United States.” 8 U. S. C. §1182(f).

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Relying on that delegation, the President concluded that it was necessary to impose entry restrictions on nationals of countries that do not share adequate information for an informed entry determination, or that otherwise present national security risks. Presidential Proclamation No. 9645, 82 Fed. Reg. 45161 (2017) (Proclamation). The plaintiffs in this litigation, respondents here, challenged the application of those entry restrictions to certain aliens abroad. We now decide whether the President had authority under the Act to issue the Proclamation, and whether the entry policy violates the Establishment Clause of the First Amendment.

Shortly after taking office, President Trump signed Executive Order No. 13769, Protecting the Nation From Foreign Terrorist Entry Into the United States. 82 Fed. Reg. 8977 (2017) (EO–1). EO–1 directed the Secretary of Homeland Security to conduct a review to examine the adequacy of information provided by foreign governments about their nationals seeking to enter the United States. §3(a). Pending that review, the order suspended for 90 days the entry of foreign nationals from seven countries—Iran, Iraq, Libya, Somalia, Sudan, Syria, and Yemen—that had been previously identified by Congress or prior administrations as posing heightened terrorism risks.§3(c). The District Court for the Western District of Washington entered a temporary restraining order blocking the entry restrictions, and the Court of Appeals for the Ninth Circuit denied the Government’s request to stay that order. Washington v. Trump, 847 F. 3d 1151 (2017) (per curiam).

In response, the President revoked EO–1, replacing it with Executive Order No. 13780, which again directed a worldwide review. 82 Fed. Reg. 13209 (2017) (EO–2). Citing investigative burdens on agencies and the need todiminish the risk that dangerous individuals would enter without adequate vetting, EO–2 also temporarily restrictedthe entry (with case-by-case waivers) of foreign nationals from six of the countries covered by EO–1: Iran, Libya,Somalia, Sudan, Syria, and Yemen. §§2(c), 3(a). The order explained that those countries had been selected because each “is a state sponsor of terrorism, has been significantly compromised by terrorist organizations, or contains active conflict zones.” §1(d). The entry restriction was to stay in effect for 90 days, pending completion of the worldwide review.
These interim measures were immediately challenged in
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court. The District Courts for the Districts of Marylandand Hawaii entered nationwide preliminary injunctions barring enforcement of the entry suspension, and therespective Courts of Appeals upheld those injunctions, albeit on different grounds. International Refugee Assistance Project (IRAP) v. Trump, 857 F. 3d 554 (CA4 2017); Hawaii v. Trump, 859 F. 3d 741 (CA9 2017) (per curiam).This Court granted certiorari and stayed the injunctions—allowing the entry suspension to go into effect—with respect to foreign nationals who lacked a “credible claim of a bona fide relationship” with a person or entity in the United States. Trump v. IRAP, 582 U. S. ___, ___ (2017) (per curiam) (slip op., at 12). The temporary restrictions in EO–2 expired before this Court took any action, and we vacated the lower court decisions as moot. Trump v. IRAP, 583 U. S. ___ (2017); Trump v. Hawaii, 583 U. S. ___ (2017).

On September 24, 2017, after completion of the worldwide review, the President issued the Proclamation before us—Proclamation No. 9645, Enhancing Vetting Capabilities and Processes for Detecting Attempted Entry Into the United States by Terrorists or Other Public-SafetyThreats. 82 Fed. Reg. 45161. The Proclamation (as itstitle indicates) sought to improve vetting procedures byidentifying ongoing deficiencies in the information needed to assess whether nationals of particular countries present “public safety threats.” §1(a). To further that purpose, the Proclamation placed entry restrictions on the nationals of eight foreign states whose systems for managing and sharing information about their nationals the Presidentdeemed inadequate.
The Proclamation described how foreign states wereselected for inclusion based on the review undertaken pursuant to EO–2. As part of that review, the Department of Homeland Security (DHS), in consultation with the State Department and several intelligence agencies,
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developed a “baseline” for the information required from foreign governments to confirm the identity of individuals seeking entry into the United States, and to determine whether those individuals pose a security threat. §1(c).The baseline included three components. The first, “identity-management information,” focused on whether aforeign government ensures the integrity of travel documents by issuing electronic passports, reporting lost orstolen passports, and making available additional identity-related information. Second, the agencies considered theextent to which the country discloses information on criminal history and suspected terrorist links, provides travel document exemplars, and facilitates the U. S. Government’s receipt of information about airline passengers and crews traveling to the United States. Finally, the agenciesweighed various indicators of national security risk,including whether the foreign state is a known or potential terrorist safe haven and whether it regularly declines to receive returning nationals following final orders of removal from the United States. Ibid.
DHS collected and evaluated data regarding all foreign governments. §1(d). It identified 16 countries as having deficient information-sharing practices and presentingnational security concerns, and another 31 countries as “at risk” of similarly failing to meet the baseline. §1(e). The State Department then undertook diplomatic efforts over a 50-day period to encourage all foreign governments to improve their practices. §1(f). As a result of that effort, numerous countries provided DHS with travel documentexemplars and agreed to share information on known orsuspected terrorists. Ibid.
Following the 50-day period, the Acting Secretary ofHomeland Security concluded that eight countries—Chad, Iran, Iraq, Libya, North Korea, Syria, Venezuela, and Yemen—remained deficient in terms of their risk profileand willingness to provide requested information. The
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Acting Secretary recommended that the President impose entry restrictions on certain nationals from all of those countries except Iraq. §§1(g), (h). She also concluded that although Somalia generally satisfied the information-sharing component of the baseline standards, its “identitymanagement deficiencies” and “significant terrorist presence” presented special circumstances justifying additionallimitations. She therefore recommended entry limitationsfor certain nationals of that country. §1(i). As for Iraq,the Acting Secretary found that entry limitations on its nationals were not warranted given the close cooperative relationship between the U. S. and Iraqi Governments and Iraq’s commitment to combating ISIS. §1(g).
After consulting with multiple Cabinet members and other officials, the President adopted the Acting Secretary’s recommendations and issued the Proclamation.Invoking his authority under 8 U. S. C. §§1182(f) and 1185(a), the President determined that certain entryrestrictions were necessary to “prevent the entry of thoseforeign nationals about whom the United States Government lacks sufficient information”; “elicit improved identity-management and information-sharing protocols and practices from foreign governments”; and otherwise “advance [the] foreign policy, national security, and counter-terrorism objectives” of the United States. Proclamation §1(h). The President explained that these restrictionswould be the “most likely to encourage cooperation” while“protect[ing] the United States until such time as improvements occur.” Ibid.
The Proclamation imposed a range of restrictions that vary based on the “distinct circumstances” in each of the eight countries. Ibid. For countries that do not cooperate with the United States in identifying security risks (Iran,North Korea, and Syria), the Proclamation suspends entryof all nationals, except for Iranians seeking nonimmigrantstudent and exchange-visitor visas. §§2(b)(ii), (d)(ii),
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(e)(ii). For countries that have information-sharing deficiencies but are nonetheless “valuable counterterrorism partner[s]” (Chad, Libya, and Yemen), it restricts entry ofnationals seeking immigrant visas and nonimmigrant business or tourist visas. §§2(a)(i), (c)(i), (g)(i). Because Somalia generally satisfies the baseline standards but was found to present special risk factors, the Proclamationsuspends entry of nationals seeking immigrant visas and requires additional scrutiny of nationals seeking nonimmigrant visas. §2(h)(ii). And for Venezuela, which refuses to cooperate in information sharing but for which alternative means are available to identify its nationals, the Proclamation limits entry only of certain governmentofficials and their family members on nonimmigrant business or tourist visas. §2(f)(ii).
The Proclamation exempts lawful permanent residents and foreign nationals who have been granted asylum. §3(b). It also provides for case-by-case waivers when a foreign national demonstrates undue hardship, and that his entry is in the national interest and would not pose a threat to public safety. §3(c)(i); see also §3(c)(iv) (listing examples of when a waiver might be appropriate, such asif the foreign national seeks to reside with a close familymember, obtain urgent medical care, or pursue significant business obligations). The Proclamation further directs DHS to assess on a continuing basis whether entry restrictions should be modified or continued, and to report tothe President every 180 days. §4. Upon completion of the first such review period, the President, on the recommendation of the Secretary of Homeland Security, determinedthat Chad had sufficiently improved its practices, and he accordingly lifted restrictions on its nationals. Presidential Proclamation No. 9723, 83 Fed. Reg. 15937 (2018).