US v. Wong Kim Ark: Ruling, Exceptions, and 2026 Challenge

In United States v. Wong Kim Ark (1898), the Supreme Court held 6-2 that the Fourteenth Amendment makes every person born on American soil a citizen of the United States, whatever their parents’ nationality or immigration status. The decision is the foundational precedent for birthright citizenship, and it is the rule now being tested at the Supreme Court in 2026.

Who Wong Kim Ark Was

Wong Kim Ark was born in 1873 at 751 Sacramento Street in San Francisco. His parents were subjects of the Emperor of China who lived permanently in the United States and ran a business, but federal law barred Chinese residents from ever naturalizing.¹² His parents eventually returned to China. He stayed in California.

In 1894 he traveled to China to visit family. When he sailed back on the steamship Coptic in August 1895, the Collector of Customs at San Francisco refused to let him land, taking the position that because his parents were Chinese subjects, he was too.¹ He filed a habeas corpus petition, won in federal district court, and the government appealed to the Supreme Court.

What the Court Decided

The Fourteenth Amendment’s Citizenship Clause reads: “All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside.”³ The whole case turned on the phrase “subject to the jurisdiction thereof.” The government argued it required complete, exclusive political allegiance, which children of Chinese subjects could not give. Wong Kim Ark’s lawyers argued it meant simply being within the reach of American law, the older common-law rule of jus soli inherited from English practice going back to Calvin’s Case in 1608.

Justice Horace Gray’s majority opinion adopted the common-law reading. The Constitution, he wrote, must be interpreted in light of principles that “were familiarly known to the framers,” and under those principles birth within a country’s territory made a person a member of that country. The opinion quoted Chancellor Kent: “Natives are all persons born within the jurisdiction and allegiance of the United States… without any regard or reference to the political condition or allegiance of their parents.”¹

The holding itself was narrow in form but sweeping in effect: a child born in the United States to parents of Chinese descent, whose parents have a permanent home here, run a business, and hold no diplomatic or official role for a foreign government, is a citizen from birth.¹

The Three Exceptions

The Court recognized only three categories of people born on American soil who are not citizens:⁴

Children of foreign diplomats, who carry sovereign immunity and are not truly subject to local law.
Children born during a hostile military occupation of American territory.
Members of Indian tribes who owed direct allegiance to their own tribal governments, a point the Court had earlier addressed in Elk v. Wilkins (1884).

Everyone else born in the United States is a citizen. Wong Kim Ark’s parents fell into none of these categories. They were ordinary residents running a business.

The Limit on Congress

The opinion drew a firm line between naturalization and birthright citizenship. Congress could set the rules for who qualifies to become a citizen through naturalization, but the Fourteenth Amendment “conferred no authority upon congress to restrict the effect of birth, declared by the constitution to constitute a sufficient and complete right to citizenship.”⁵ The Chinese Exclusion Act could bar laborers from entering the country. It could not strip citizenship from someone the Constitution had already made a citizen. The Court ordered Wong Kim Ark released and admitted.

The Dissent

Chief Justice Melville Fuller, joined by Justice John Marshall Harlan, read “subject to the jurisdiction thereof” to require complete, exclusive political allegiance to the United States. In his view, a person could not be fully subject to American jurisdiction while owing allegiance to a foreign sovereign, and because Chinese law barred Wong Kim Ark’s parents from renouncing their allegiance, he considered them “pilgrims and sojourners” rather than members of the American political community.⁶ Fuller argued that the Fourteenth Amendment was written to settle the citizenship of formerly enslaved people, not to create a general rule covering the children of all foreign nationals. His approach would have left birthright citizenship to congressional discretion. The majority rejected every piece of that argument.

Why the Case Still Matters

Wong Kim Ark has been the law for more than 125 years. Every person born on American soil, outside the three narrow exceptions, is a citizen. The rule does not turn on whether a child’s parents are lawful permanent residents, visa holders, undocumented, or anything else. The constitutional text draws no such lines, and the Court read it that way in 1898. Beyond the specific holding, the case established a structural point: the Constitution’s citizenship guarantee sits above ordinary legislation, and Congress cannot legislate around it.⁵

The 2026 Challenge

On January 20, 2025, President Trump signed an executive order attempting to restrict birthright citizenship. It would have limited citizenship at birth to children with at least one parent who is a U.S. citizen, U.S. national, or lawful permanent resident. Children born to parents holding temporary visas, DACA, TPS, parole, or other non-permanent statuses would have been excluded.

Federal courts blocked the order almost immediately. As of mid-2026, overlapping injunctions from a class action in Maryland (CASA v. Trump), a separate class action in New Hampshire (Barbara v. Trump), and multi-state lawsuits brought by coalitions of more than twenty states prevent any enforcement, and the government continues to recognize the citizenship of every baby born on American soil.

The Supreme Court took the case on an accelerated schedule, bypassing the normal appeals process. Oral arguments in Trump v. Barbara took place on April 1, 2026, and a decision is expected before the term ends in summer 2026. The question is whether the executive branch can reinterpret the Citizenship Clause by executive order, which is a direct test of the principle Wong Kim Ark set in 1898. Until the Court rules, the constitutional rule stands unchanged: birth on American soil means American citizenship.

1
Justia U.S. Supreme Court Center. United States v. Wong Kim Ark
2
National Archives. Chinese Exclusion Act (1882)
3
Congress.gov. Fourteenth Amendment
4
Congress.gov. Constitution Annotated
5
Cornell Law School. United States v. Wong Kim Ark
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Library of Congress. United States v. Wong Kim Ark