On April 1, 2026, the Supreme Court will hear oral arguments in Trump v. Barbara, the most significant birthright citizenship case in more than a century. At its core is a simple question with enormous consequences: does every baby born on American soil automatically become a U.S. citizen?
For 158 years, the answer has been yes. The 14th Amendment, ratified in 1868, states: “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.” That language has been understood to guarantee citizenship to virtually everyone born in America, with narrow exceptions for children of foreign diplomats, enemy soldiers occupying U.S. territory, and certain Native Americans under tribal governance.
President Trump’s executive order, signed on his first day back in office on January 20, 2025, seeks to change that understanding. The order would deny automatic citizenship to babies born in the United States unless at least one parent is a U.S. citizen or permanent resident. It targets two groups: children born to parents in the country without legal status, and children born to parents on temporary visas such as work or student permits.
The Birthright Citizenship Case: How We Got Here
The executive order never took effect. Within hours of Trump signing it, lawsuits were filed across the country. Federal judges issued injunctions blocking the order, all concluding it violated the Constitution. The Ninth Circuit Court of Appeals agreed, ruling that the order “is invalid because it contradicts the plain language of the Fourteenth Amendment.”
In June 2025, the Supreme Court weighed in for the first time, but not on the constitutional question. In Trump v. CASA, the justices voted 6-3 to ban lower courts from issuing nationwide injunctions that block government policies everywhere at once. That ruling narrowed the tools available to challengers but did not address whether birthright citizenship itself was protected.
That same day, a new challenge was filed. In New Hampshire, the ACLU brought a class-action lawsuit on behalf of babies who would lose their citizenship under the order. The lead plaintiff, a Cuban asylum-seeker known only as “Barbara” for safety reasons, gave the birthright citizenship case its name. On July 10, 2025, Judge Joseph Laplante issued a preliminary injunctionA court order temporarily halting an action while a legal case is decided. The requesting party must show likely harm and a reasonable chance of winning. protecting all affected babies, concluding the order “likely contradicts the text of the Fourteenth Amendment and the century-old untouched precedent that interprets it.”
The Supreme Court agreed to hear the case on December 5, 2025. A decision is expected by late June or early July 2026.
What the 14th Amendment Actually Says
The entire debate hinges on five words: “subject to the jurisdiction thereof.” What did the people who wrote the 14th Amendment mean by that phrase?
The Trump administration argues it means something demanding: full political allegiance. Under this reading, only people who owe “direct and immediate allegiance” to the United States qualify. Children of undocumented immigrants and temporary visitors fail that test, U.S. Solicitor General D. John Sauer wrote in the government’s brief, because their parents’ primary loyalty lies with their home countries.
The challengers say this reading rewrites history. According to historian Anna O. Law of CUNY Brooklyn College, when the framers wrote “subject to the jurisdiction thereof,” they meant everyone except three narrow categories: children of foreign diplomats, children of invading enemy soldiers, and certain Native Americans under tribal governance. That was it.
Congressional debates from the 1860s back this up. When lawmakers were challenged on whether the clause would cover children born to Chinese immigrants, who were barred from becoming citizens themselves, the framers said yes, explicitly: they meant those children too.
The 128-Year Precedent
The Supreme Court addressed this birthright citizenship case once before, in 1898. Wong Kim Ark was born in San Francisco to Chinese parents who were permanent residents but, under the Chinese Exclusion Act, could never become citizens themselves. When Wong Kim Ark returned from a trip to China, immigration officials refused to let him back in, claiming he was not American.
The Supreme Court ruled 6-2 in his favor. Justice Horace Gray wrote that the 14th Amendment “affirms the ancient and fundamental rule of citizenship by birth within the territory, in the allegiance and under the protection of the country, including all children here born of resident aliens.”
The Trump administration does not ask the court to overturn Wong Kim Ark. Instead, it argues the decision actually supports a narrower reading because Wong Kim Ark’s parents were “domiciled” in the United States. The ACLU calls this a distortion: “Under the common law, the rule was citizenship by birth, regardless of parental nationality or immigration status. Domicile was irrelevant.”
What Happens If the Court Sides With Trump
The practical consequences could be staggering. With more than 3.6 million babies born in the United States each year, the government would need to verify the immigration status of every newborn’s parents before issuing citizenship documents. Justice Brett Kavanaugh pressed Solicitor General Sauer on exactly this point during last year’s hearings, asking whether the government would need to run background checks “for all the newborns.”
Jill Habig, CEO of Public Rights Project, warned in a brief that the policy would create “a tidal wave of legal confusion and chaos.” Birth certificates, she noted, are currently the primary way Americans prove citizenship. Under the new system, they would no longer suffice.
Other countries offer a cautionary tale. The United Kingdom abolished automatic birthright citizenship in 1983, and the aftermath included the Windrush scandal, in which Caribbean immigrants who had lived in Britain for decades suddenly could not prove their legal status. As the advocacy group Reprieve wrote in a brief to the Supreme Court: “The theory may have appeared simple but the practice was brutal. A system built on a bright-line rule gave way to one that bureaucracy could not administer.”
Where Americans Stand
Public opinion on the birthright citizenship case is more complicated than either side suggests. A Public Religion Research Institute survey found two-thirds of Americans support granting citizenship regardless of parents’ status. But when pollsters specify that parents are in the country without legal authorization, support drops sharply. The Pew Research Center found Americans split almost exactly 50-50 on that question.
The divide runs along familiar lines: three-quarters of Democrats support birthright citizenship for children of undocumented parents, compared to roughly a quarter of Republicans. Race, age, and media consumption also predict where people fall.
What Comes Next
The United States is one of roughly 30 countries that offer automatic birthright citizenship, most of them in the Western Hemisphere. The legal term is jus soliThe legal principle granting citizenship based on birth within a country's territory, regardless of parents' nationality., Latin for “right of soil,” as opposed to jus sanguinisThe legal principle granting citizenship based on parents' nationality, regardless of place of birth., “right of blood,” which ties citizenship to parentage.
University of California, Davis law professor Vikram Amar framed the stakes this way: “The whole American experiment is about basing your opportunities and your future on who you are and what you make of your own equality rather than which family and which bloodline you were born into.”
The framers of the 14th Amendment understood the risk of leaving birthright citizenship as mere legislation. As historian Law explained, they deliberately chose the harder path of a constitutional amendment because they feared a future Congress or Supreme Court could simply erase a statute. By embedding it in the Constitution, they intended to make it permanent.
Whether that permanence holds now rests with nine justices. The birthright citizenship case will be argued on April 1, and the court’s decision, expected by summer, will determine whether the constitutional promise made 158 years ago endures or is fundamentally rewritten.
On April 1, 2026, the Supreme Court hears oral arguments in Trump v. Barbara, the most consequential birthright citizenship case since United States v. Wong Kim Ark in 1898. The question presented: whether Executive Order 14160 “complies on its face with the Citizenship Clause and with 8 U.S.C. 1401(a), which codifies that Clause.” The answer will determine whether 158 years of constitutional practice survives or is substantially narrowed.
The Birthright Citizenship Case: Executive Order 14160
President Trump signed the order on January 20, 2025, his first day in office. It directs federal agencies to deny citizenship to children born in the United States in two circumstances: (1) when the mother is unlawfully present and the father is neither a citizen nor a lawful permanent resident, and (2) when the mother’s presence is lawful but temporary (work visa, student visa, tourist visa) and the father likewise lacks permanent status.
The order has never been implemented. Courts have repeatedly blocked it, finding it violates the Constitution, over a century of Supreme Court precedent, and a longstanding federal statute. Multiple federal district courts issued preliminary injunctionsA court order temporarily halting an action while a legal case is decided. The requesting party must show likely harm and a reasonable chance of winning.. The Ninth Circuit affirmed, holding the order “is invalid because it contradicts the plain language of the Fourteenth Amendment’s grant of citizenship to ‘all persons born in the United States and subject to the jurisdiction thereof.'”
Procedural History: From CASA to Barbara
The administration first reached the Supreme Court via Trump v. CASA in June 2025, but on a narrow procedural question: whether district courts could issue universal injunctionsA court order that applies to all people affected by a law or policy, not just the parties who filed the lawsuit. Also called a nationwide injunction. barring enforcement of the order nationwide. In a 6-3 decision, Justice Amy Coney Barrett wrote for the majority that no historical precedent supported such remedial power. The court did not reach the merits of the birthright citizenship case.
On the same day as the CASA decision, a new class-action challenge was filed in the District of New Hampshire. The lead plaintiff, identified only as “Barbara,” is a Cuban asylum-seeker. On July 10, 2025, Judge Joseph Laplante certified a class of babies born on or after February 20, 2025, who would be denied citizenship under the order, and issued a preliminary injunction. The court concluded the class was “likely to succeed on the merits” of its Fourteenth Amendment claim.
The administration petitioned for certiorariA writ by which a higher court reviews a lower court's decision, granted at the higher court's discretion. on September 26, 2025. The court granted review on December 5, 2025, framing the question as whether the order complies with the Citizenship Clause and 8 U.S.C. 1401(a).
The Textual Battleground: “Subject to the Jurisdiction Thereof”
The entire birthright citizenship case turns on five words from the Fourteenth Amendment, ratified in 1868: “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.”
Solicitor General D. John Sauer advances a “complete political jurisdiction” theory. To be “subject to the jurisdiction” of the United States, a person must owe it “direct and immediate allegiance” and receive its “protection.” Children of citizens and permanent residents meet that test. Children of temporary visitors and undocumented immigrants do not, Sauer argues, because their parents’ “primary allegiance” lies with their home countries.
Sauer roots this reading in two decisions by Justice Horace Gray. In Elk v. Wilkins (1884), Gray held that a Winnebago man born on a reservation was “no more ‘born in the United States and subject to the jurisdiction thereof'” than children of foreign ambassadors. In the Slaughter-House Cases (1873), the court acknowledged the amendment’s “one pervading purpose” was “the freedom of the slave race.”
The respondents, represented by ACLU National Legal Director Cecillia Wang, offer the counter-reading. They cite Wong Kim Ark’s holding that the Citizenship Clause “enshrines the preexisting common law of citizenship” under which “the rule was citizenship by birth, regardless of parental nationality or immigration status. Domicile was irrelevant.”
The respondents further point to the antecedent common law. In Lynch v. Clarke (N.Y. Ch. Ct. 1844), a New York court held that a child born in New York to Irish parents living temporarily in the United States was a U.S. citizen. The 14th Amendment’s framers, they argue, drew on and reaffirmed this tradition.
The Statutory Argument: 8 U.S.C. 1401(a)
Beyond the constitutional question, the birthright citizenship case presents a statutory issue that could resolve the matter on narrower grounds. Section 1401(a) of the Immigration and Nationality Act, first enacted in 1940 and reenacted in 1952, provides that anyone “born in the United States, and subject to the jurisdiction thereof” is a citizen.
The respondents argue this language was a deliberate codification of the prevailing understanding of the Citizenship Clause, including Wong Kim Ark. When Congress used the phrase “subject to the jurisdiction thereof,” it incorporated the established meaning: virtually universal birthright citizenship with only the traditional narrow exceptions.
Sauer counters that the statutory phrase inherited the constitutional meaning he advocates, not “what Congress thought it meant in 1940 or 1952.” This textualist move is notable: it asks the court to override legislative intent in favor of what the administration contends is the original constitutional meaning.
The Wong Kim Ark Problem
The administration does not ask the court to overrule Wong Kim Ark. Instead, it attempts to limit the decision to its facts. Wong Kim Ark’s parents were permanent residents of the United States, Sauer emphasizes. The decision’s holding, he argues, extends only to children of noncitizens “who have a permanent domicile and residence in the United States.”
This reading faces a textual obstacle. Justice Gray’s majority opinion does not restrict the holding to domiciled aliens. It states that the 14th Amendment “in clear words and in manifest intent includes the children born, within the territory of the United States, of all other persons, of whatever race or color, domiciled within the United States.” But in the same opinion, Gray also cited The Schooner Exchange v. McFaddon (1812), explaining that even temporary visitors are “subject to the jurisdiction” of the United States.
The dissent in Wong Kim Ark, written by Chief Justice Melville Fuller, advanced the narrower reading the administration now adopts. Fuller argued Wong Kim Ark was not “completely subject to the jurisdiction” because as Chinese citizens, his parents owed a duty to the emperor of China. That dissent lost 6-2.
The Historical Record
Historian Anna O. Law, author of Migration and the Origins of American Citizenship, argues the administration’s originalism rests on a fundamental misunderstanding of American migration history. A common argument for restricting birthright citizenship is that “there were no illegal aliens” when the 14th Amendment was drafted. Law demonstrates this is false: states enforced migration restrictions throughout the 19th century, and Congress banned the international slave trade in 1808, creating unauthorized entrants long before the amendment.
More pointedly, Law notes that the framers deliberately chose to embed birthright citizenship in the Constitution rather than leaving it as statutory law (it first appeared in the Civil Rights Act of 1866). They feared a future Congress or Supreme Court could erase a mere statute. The constitutional amendment was designed to be durable.
Implementation Concerns and Comparative Precedent
Even justices sympathetic to executive power have flagged implementation problems. During oral arguments in CASA, Justice Brett Kavanaugh pressed Solicitor General Sauer on how the government would determine citizenship for over 3.6 million annual births. Would hospitals change their procedures? Would federal officials run immigration checks on every set of parents? “Is that how it’s going to work?” Kavanaugh demanded.
Sauer’s answer, that “federal officials will have to figure that out,” did not satisfy the questioning. The State Department has since published guidance requiring “original proof of parental citizenship or immigration status” for passport applications, and the Social Security Administration would check its own databases, which the agency itself has acknowledged contain potentially millions of inaccurate immigration records.
The United Kingdom’s experience offers a cautionary parallel. Britain abolished automatic birthright citizenship in 1983. Decades later, the Windrush scandal revealed that Caribbean immigrants invited to the UK after World War II, and their children, could no longer prove their status. As the advocacy group Reprieve wrote in an amicus brief: “A system built on a bright-line rule gave way to one that bureaucracy could not administer, leaving people who had lived their whole lives as British unable to prove it on paper.”
Amici and Political Stakes
The birthright citizenship case has attracted an extraordinary volume of amicus briefs. The respondents were joined by dozens of amici curiae, including civil rights organizations, labor unions, and legal scholars. A bipartisan group of constitutional law professors argues the text and history are unambiguous. Congressional Democrats filed a bicameral brief defending the established interpretation.
Public opinion, meanwhile, is sharply divided along partisan and demographic lines. A PRRI survey found two-thirds of Americans support birthright citizenship regardless of parental status. But Pew found the country split 50-50 when specifically asked about children of parents who immigrated illegally. Three-quarters of Democrats support it in that context; only about a quarter of Republicans do.
Possible Outcomes
The court has several options. It could affirm the lower court and invalidate the executive order entirely, reaffirming the broad reading of the Citizenship Clause that has prevailed since Wong Kim Ark. It could rule on statutory grounds under 8 U.S.C. 1401(a) without reaching the constitutional question. Or it could accept some version of the administration’s narrower reading, upending the birthright citizenship case precedent that has stood for 128 years.
UC Davis law professor Vikram Amar frames the stakes beyond the legal technicalities: “The whole American experiment is about basing your opportunities and your future on who you are and what you make of your own equality rather than which family and which bloodline you were born into.”
The court’s decision, expected by late June 2026, will determine whether the United States remains a jus soliThe legal principle granting citizenship based on birth within a country's territory, regardless of parents' nationality. nation or takes its first step toward a system of citizenship by parentage. Either way, the birthright citizenship case will be one of the defining rulings of the Roberts Court.
