INA Section 212(f), codified at 8 U.S.C. § 1182(f), is a one-sentence statute that lets the President, acting alone by proclamation, suspend the entry of any foreign national or class of foreign nationals whenever the President finds their entry would be detrimental to the interests of the United States. The President sets the scope, the conditions, and how long the suspension lasts. No congressional approval, no waiting period, no court sign-off. The Supreme Court has said the provision “exudes deference to the President in every clause.”1Supreme Court of the United States. Trump v. Hawaii, 585 U.S. ___ (2018)
What the Statute Says
The full text of 8 U.S.C. § 1182(f) is a single sentence. Whenever the President finds that allowing certain foreign nationals to enter would be detrimental to U.S. interests, the President can issue a proclamation suspending their entry as immigrants, nonimmigrants, or both, and can impose whatever conditions the President considers appropriate, for as long as the President considers necessary.2Office of the Law Revision Counsel. 8 USC 1182 – Inadmissible Aliens That is the whole provision.
The only legal prerequisite is the presidential finding itself, made in the text of the proclamation. “Interests of the United States” is not defined by statute, and courts have read it broadly. Proclamations have rested on national security threats, inadequate vetting in foreign countries, public health emergencies (including COVID-19 entry restrictions), foreign policy disputes, and human rights abuses by foreign officials.3Congressional Research Service. COVID-19 – Federal Travel Restrictions and Quarantine Measures In Trump v. Hawaii, the Supreme Court called that finding the “sole prerequisite” and said the President had “undoubtedly fulfilled” it by first ordering a review of every country’s information-sharing practices.1Supreme Court of the United States. Trump v. Hawaii, 585 U.S. ___ (2018)
Who Can Be Blocked
The statute authorizes restrictions on “all aliens or any class of aliens,” and the Supreme Court has held that “class” comfortably includes groups defined by nationality. Nationality is the most familiar basis, but past proclamations have also targeted people by:
- Geographic presence, meaning recent travel to certain countries regardless of citizenship, as during COVID-19.
- Conduct, such as foreign officials involved in corruption, human rights abuses, or the undermining of democracy.
- Institutional affiliation, such as students and researchers connected to entities supporting a foreign government’s military-civil fusion strategy.4Federal Register. Suspension of Entry as Nonimmigrants of Certain Students and Researchers From the Peoples Republic of China
- Visa category, with some proclamations suspending only specific visa types rather than blocking all entry from a country.
A proclamation can reach immigrants seeking permanent residence, nonimmigrants seeking temporary stays like students or business travelers, or both. The Department of State enforces the restrictions at the visa stage, and the Department of Homeland Security enforces them at ports of entry, using the parameters written into each proclamation.5U.S. Department of State Foreign Affairs Manual. 9 FAM 302.14 – Ineligibility Based on Sanctioned Activities
What Courts Have Said
The controlling case is Trump v. Hawaii (2018), which upheld Proclamation 9645’s restrictions on entry from several countries in a 5-4 decision. Chief Justice Roberts wrote that 212(f) “entrusts to the President the decisions whether and when to suspend entry, whose entry to suspend, for how long, and on what conditions,” and gives the President “ample power” to impose restrictions on top of those already in the immigration code.1Supreme Court of the United States. Trump v. Hawaii, 585 U.S. ___ (2018)
Three points from the ruling matter for anyone trying to read a proclamation today. A 212(f) suspension does not need a fixed end date; it can last as long as the President finds the triggering conditions persist. A “class” can be defined by nationality. And courts applied the most deferential standard of review, rational basis, asking only whether the proclamation was “plausibly related” to the government’s stated objective.6Law.Cornell.Edu. Trump v. Hawaii – Supreme Court
The deference goes back further. In Kleindienst v. Mandel (1972), the Supreme Court said that when the executive branch acts on “a facially legitimate and bona fide reason,” courts will not look behind that decision or weigh it against affected constitutional interests.7Library of Congress. Kleindienst v. Mandel, 408 U.S. 753 (1972) The practical result: a person challenging a 212(f) proclamation must show it has no rational connection to a legitimate government interest, which is an extremely difficult bar when national security or foreign affairs are invoked. Courts can still ask whether a proclamation exceeds the statute itself, for example by trying to override other INA provisions rather than supplement them, but judges have shown little appetite for second-guessing the underlying finding.
Exceptions and Waivers
Most 212(f) proclamations carve out exceptions and set up a waiver process for individuals with compelling reasons to enter. These are not required by the statute. They exist because the President chose to include them.
Lawful permanent residents are routinely exempted. Diplomatic travelers, certain military personnel, and people whose entry the Secretary of State or Secretary of Homeland Security determines is in the national interest are frequently excepted as well. For everyone else covered, proclamations typically offer a case-by-case waiver. Under Proclamation 9645, an applicant had to satisfy three conditions together: that denying entry would cause undue hardship, that entry would not threaten national security or public safety, and that entry would be in the national interest.
One point matters if you are trying to work through a denial. There is no statutory waiver under 212(f). The Foreign Affairs Manual states plainly that “no waiver is available for immigrants under INA 212(f)” and “no waiver is available for nonimmigrants ineligible under INA 212(f).”5U.S. Department of State Foreign Affairs Manual. 9 FAM 302.14 – Ineligibility Based on Sanctioned Activities Any waiver authority comes from the proclamation’s own terms, evaluated by consular officers and Customs and Border Protection. Because that authority is discretionary rather than a statutory entitlement, recourse when a waiver is denied is limited.
What 212(f) Does Not Authorize
The statute speaks about “entry.” It does not authorize removal or deportation of people already inside the United States, and it does not revoke status that has already been granted. A green card holder physically present in the country is not in the same position as someone applying for a visa abroad. The statute also does not let the President rewrite immigration categories, override congressionally set visa quotas, or create new grounds of deportability. It is an entry-suspension tool.
Those limits are being tested. A January 2025 proclamation invoked 212(f) to claim authority not just to suspend entry but to “repel, repatriate, or remove” migrants and to bar them from seeking benefits under the INA. Whether 212(f) actually supports those actions is an open question. The statutory text does not mention removal, and no court has endorsed that reading.
The sharpest unresolved conflict involves asylum. Section 208 of the INA (8 U.S.C. § 1158) says any person physically present in the United States or arriving at the border, “whether or not at a designated port of arrival,” may apply for asylum regardless of immigration status.8Office of the Law Revision Counsel. 8 USC 1158 – Asylum Recent administrations have nonetheless used 212(f) to restrict asylum access. Proclamation 10773 suspended entry along the southern border during high-crossing periods and limited asylum eligibility for people who entered irregularly. The current administration has invoked 212(f) to suspend refugee admissions, allowing entry only through case-by-case DHS exceptions.9U.S. Customs and Border Protection. Executive Order on Realigning the United States Refugee Admissions Program Whether one statute’s broad grant of executive discretion can effectively override another statute’s affirmative grant of individual rights is a question the courts have not definitively answered.
How the Power Has Been Used
Every president since Ronald Reagan has invoked 212(f). Early uses were narrow: individual sanctions against foreign officials involved in corruption, human trafficking, or threats to democratic transitions in countries such as Zimbabwe, Belarus, and Lebanon. President Obama invoked it nineteen times, mostly against individuals linked to human rights abuses, malicious cyber activity, or U.N. Security Council sanctions.
The scope grew sharply under President Trump. Executive Order 13,769 in January 2017 suspended entry from seven majority-Muslim countries. After legal challenges, it was replaced by Proclamation 9645, which the Supreme Court upheld in Trump v. Hawaii. Proclamation 10043 suspended entry of certain Chinese nationals connected to military-civil fusion efforts on F and J visas and remains in effect.4Federal Register. Suspension of Entry as Nonimmigrants of Certain Students and Researchers From the Peoples Republic of China
In June 2025, a new proclamation fully suspended entry of nationals from twelve countries: Afghanistan, Burma, Chad, the Republic of the Congo, Equatorial Guinea, Eritrea, Haiti, Iran, Libya, Somalia, Sudan, and Yemen. It also partially restricted entry from seven additional countries by blocking specific visa categories, including tourist, student, and exchange visitor visas.10The White House. Restricting the Entry of Foreign Nationals to Protect the United States From Foreign Terrorists and Other National Security and Public Safety Threats A single sentence in the immigration code, read the way courts have read it, does most of the work behind each of these actions.