ANALYSIS: The Supreme Court rules 6-3 in favor of Trump, stating that U.S. soil—not blood—determines citizenship

The Text and Its Origin

The 14th Amendment, adopted in 1868 following the Civil War, states: “All persons born or naturalized in the United States, and subject to its jurisdiction, are citizens of the United States and of the State in which they reside.” ” This amendment was explicitly designed to counter the 1857 Dred Scott decision, which had established that neither enslaved people nor free Black people could be U.S. citizens. It enshrines the principle of jus soli—the right of the soil—over jus sanguinis—the right of blood.

Chief Justice Roberts, in his majority opinion of June 30, 2026, was straightforward: the amendment restored the nation to the understanding of citizenship adopted at its founding, known as “birthright citizenship,” under which children born on U.S. soil were generally U.S. citizens. His words, now destined to go down in history: “It was the soil—not the blood—that would determine citizenship going forward.”

The June 30 decision in his own words

Roberts wrote: “Citizenship was then, and is now, the right to have rights—to participate freely in our political community. The framers of the 14th Amendment extended that promise to ‘every person born free in this country.’ We uphold that promise today. ” This wording is not merely a legal conclusion. It is a statement of principle about what America stands for—just days before its 250th anniversary of independence. The Court chose the date of its publication with an obvious awareness of its symbolic weight.

Trump’s argument was that the 14th Amendment should apply only to children whose parents had “permanent domicile and residence” in the United States—an interpretation based on a narrow reading of an 1898 decision in the case of a U.S. citizen of Chinese descent (Wong Kim Ark). Roberts rejected that reading. Solicitor General John Sauer, representing the Trump administration, had told the Court that today’s immigration reality represented a “new world.” Roberts replied, “It’s the same soil. It’s the same Constitution.”

Roberts said: same ground, same Constitution. That is the shortest and clearest statement in this decision. Trump wanted the Court to grant him the latitude to redefine American identity by executive order. Roberts said no—and he said no with the permanence that only constitutional jurisprudence can provide. This is not a temporary victory. It is a lock.

The 1898 argument that Trump had invoked

The Trump administration had relied on a narrow interpretation of the United States v. Wong Kim Ark (1898) decision, in which the Supreme Court had confirmed that Wong Kim Ark, born in the United States to Chinese parents with a permanent domicile, was a U.S. citizen. Trump had argued that this decision protected only children whose parents had such “permanent domicile”—and thus did not include children of parents in the country unlawfully or on a temporary basis. It was this interpretation that the Court rejected on June 30, 2026.

Roberts’ majority opinion explicitly considered the history and precedents—including Wong Kim Ark—to conclude that children born to parents in undocumented or temporary status fully satisfy the citizenship clause of the 14th Amendment. The Court did not seek a middle ground: it resolved the constitutional issue, which the administration had sought to avoid by initially arguing on statutory grounds.

Kavanaugh’s Dissent—and What It Reveals

Justice Brett Kavanaugh, appointed by Trump during his first term, did not join the majority on the constitutional basis. He stated that he would have ruled against the executive order on a narrower basis—finding that the executive order violated a 1952 federal law codifying citizenship rights, without necessarily deciding the constitutional issue. Kavanaugh wrote: “As the Court’s opinion reveals, with its detailed account of history and case law, and through the thoughtful and reasoned dissenting opinions, the constitutional issue is far more complicated than the statutory issue.”

Kavanaugh’s concurring opinion, based on narrower grounds, is significant for two reasons. First, it confirms that the 6-3 majority in the decision was not unanimous in its reasoning—a nuance that could have implications for future cases. Second, it indicates that even a Trump-appointed judge refuses to follow the narrow interpretation of the 14th Amendment that the administration was advocating. The coalition that rejected Trump’s position included Roberts, the four liberal justices, and—in part—Kavanaugh—and this is no accident. It is an indication of the mindset of the Court’s center when faced with claims of expansive presidential authority.

Kavanaugh says the constitutional issue is complicated. Roberts says it isn’t—or at least, that it’s not possible to sidestep it and take refuge in statutory law when the issue is so fundamental. This tension between the two approaches is not insignificant. It foreshadows future battles over other aspects of the 14th Amendment. But for now, Roberts has decided—and Kavanaugh has not dissented. The result remains 6-3.

What the Three Conservative Justices Said

Justices Clarence Thomas, Samuel Alito, and Neil Gorsuch dissented. Justice Thomas stated that the decision “devaluates” U.S. citizenship and is unlikely to “stand the test of time.” Neither the detailed grounds for Alito’s dissent nor Gorsuch’s full reasoning had been reproduced in their entirety in the sources available at the time of writing. What is documented: Kavanaugh described these dissenting opinions as “thoughtful and well-reasoned”—a rare description by a concurring justice of the opinions of his dissenting colleagues, suggesting that the arguments against the majority were legally substantial, even if they were not persuasive.

The composition of the dissenters is notable: Thomas and Alito are the Court’s oldest and most conservative justices, with long-standing, well-established positions on the originalist interpretation of the Constitution. Gorsuch, another Trump appointee, had previously shown some independence on certain issues of individual liberty, but he joined the dissent in this case. The fact that all three dissenting justices are Republican appointees—and that Kavanaugh, also a Republican appointee, refused to join them—illustrates the internal divisions within the Court’s conservative majority on issues of executive authority.

The Political Significance of 6-3

The 6-3 vote is as political as it is legal. In the U.S. context, where every Supreme Court decision is immediately framed in partisan terms, a 6-3 defeat for Trump carries greater symbolic weight than a 5-4 defeat. It means that two of the justices he appointed (Roberts was appointed by Bush, but Kavanaugh was appointed by Trump) voted against his position. It makes it harder to argue that the Court is an instrument of his power. And it gives the decision broader institutional legitimacy than a narrow majority would.

The ACLU, which represented the immigrants who challenged the executive order, described birthright citizenship as “fundamental to who we are as a nation.” Its national legal director, Cecilia Wang, is herself a U.S. citizen under this constitutional principle—born in the United States to Taiwanese parents who held student visas. She told the justices during oral arguments: “Ask any American what our rule of citizenship is, and they will tell you that anyone born here is also a citizen. The clear and fixed rule of the 14th Amendment has contributed to the growth and influence of our nation.”

Thomas says the decision devalues U.S. citizenship. I understand the abstract argument. But there’s a practical question that Thomas doesn’t ask: How does a baby born in New York—who will grow up in an American school, pay U.S. taxes, and live under the American flag—devalue anyone’s citizenship? The value of citizenship is not a finite resource that is depleted by granting it to more people. It is a promise. And this decision affirms that it remains universal.

Barbara and Susan — Two Mothers, Two Stories

Behind the 255,000 annual statistics, the cases brought before the Supreme Court had faces. Among the parents representing their children in the Trump v. Barbara case was a Honduran woman who had been living in the United States since 2024 and had given birth to her child after Trump’s executive order was signed. Identified by the pseudonym Barbara in court documents, she was seeking asylum due to gang activity in Honduras, and her family had integrated into a local community in New Hampshire.

Another mother, known by the pseudonym Susan, had come to the United States from Taiwan in 2013 on a student visa and was applying for a work visa. She and her husband had four children—three born in the United States before the executive order, and one born after. She wrote in her court documents: “My husband and I have come to build a life here. My baby has the right to citizenship and a future in the United States.” It is these stories—not abstract constitutional theories—that the June 30, 2026, ruling protected.

What 255,000 children a year actually mean

According to the Migration Policy Institute, approximately 255,000 children born each year in the United States would have been denied citizenship if Trump’s executive order had stood. That represents about 6% of all projected births in the United States. Over twenty years, that would amount to more than 5 million children who would have been born on American soil, grown up in America, spoken English, and attended American schools—yet would not have had an American passport or the civil and political rights that come with it. This is not just a matter of paperwork. It is a matter of belonging, of rights, and of what Roberts calls the “right to have rights.”

This figure of 255,000 children also illustrates why the debate over birthright citizenship is as much a demographic issue as it is a constitutional one. U.S. population growth depends in part on immigration and births to immigrant families. Excluding 6% of births from U.S. citizenship would have had an impact on the labor force, tax revenues, and the country’s demographic composition within two generations. These calculations are not absent from the political debates surrounding this issue—even though the Court limited itself to constitutional law.

Five million children over twenty years. Children who would have grown up speaking English, played in American parks, sung the national anthem in American schools—and would have been stateless in their own birth country. I do not see how a democracy that claims to be founded on equality can hold this position without contradiction. The Court rejected this contradiction. And rightly so.

A defeat in a series of battles

The June 30, 2026, ruling on birthright citizenship is part of a broader context of clashes between the Trump administration and U.S. courts. According to USA Today, a few months earlier, the same Supreme Court had struck down Trump’s signature tariffs—another rejection of the expansive executive authority he had claimed since returning to the White House. In other immigration cases, however—notably a recent ruling allowing Trump to end protections against deportation for hundreds of thousands of immigrants—the Court had upheld presidential authority.

This mixed picture—Trump loses on birthright citizenship and tariffs, Trump wins on certain protections against deportation—illustrates that the Supreme Court does not function as an ideological bloc. It adjudicates on a case-by-case basis, based on constitutional texts and legal precedents. When the text is clear—as with the 14th Amendment on citizenship—Trump loses. When the law allows for greater executive discretion—as in certain decisions on immigration protections—he can win. This is how the rule of law normally functions. It is not always politically satisfying for anyone.

The “birth tourism” argument—the text of the Constitution vs. immigration policy

During oral arguments in April 2026, Solicitor General John Sauer, representing Trump, argued that “birth tourism”—pregnant women coming to the United States specifically so their child would be born a citizen—posed a threat to national security and encouraged irregular immigration. Roberts responded that these political concerns “have no bearing on the legal analysis before us.” This distinction—between the valid political reasons for wanting a different law and the constitutional rights enshrined in the current law—is at the heart of what a constitutional court does. The Court’s role is not to decide whether Trump’s policies make sense. It is to decide whether they comply with the Constitution. They do not, according to 6 out of 9 justices.

This distinction is particularly important in the current U.S. context, where political movements seek to exploit judicial institutions to serve electoral objectives. Roberts’ decision upholds the principle that the Constitution is interpreted through its text and case law, not through opinion polls or campaign platforms. This is a lesson that Trump has tried to learn the hard way since returning to power—and one that the Court has refused to teach him.

Sauer says that birth tourism is a threat to national security. Roberts says that does not change what the constitutional text says. I am glad to live in a system where these two assertions do not cancel each other out, but where one prevails according to established rules. Politicians can say whatever they want. The text of the Constitution says what it says. And what it says is: born here, citizen here.

Jus soli as an American exception in the world

The United States remains one of the few developed countries to practice jus soli without restriction—citizenship granted to anyone born on U.S. soil, regardless of their parents’ status. Most European countries apply forms of jus sanguinis or jus soli conditional on parental residency periods. The continuation of unconditional jus soli in the United States, as established by the decision of June 30, 2026, preserves a significant American exception within the global architecture of citizenship.

This exception is not without geopolitical consequences: it contributes to the United States’ appeal as an immigration destination, supports its long-term population growth, and sends a signal to the millions of people worldwide who choose the United States as their destination. Had Trump succeeded in restricting jus soli, he would have altered a founding pillar of American identity—a change whose effects on the country’s appeal and demographics would have been measurable over several decades.

The Ruling in the Western Context

The U.S. Supreme Court’s decision comes at a time when several Western democracies are debating the rules governing national belonging and citizenship. In Europe, on that same day, June 30, 2026, the European Union began a debate on excluding male Ukrainian refugees from temporary protection—another form of categorization by status and origin in the granting of rights. These two debates, separate both geographically and legally, raise the same fundamental question: Who belongs to a political community, and on what basis? Is citizenship a right conferred by birth, or a favor granted conditionally by the state? The U.S. ruling of June 30, 2026, signed by John Roberts, is unambiguous: it is the soil, not administrative approval, that creates belonging.

For the West as a whole, this decision sends a signal about the resilience of liberal institutions in the face of populist movements seeking to restrict national membership. This signal is not universal—other countries make different choices—but it is notable that it comes from a Court in which half the members were appointed by Republican presidents.

On the same day, the United States upholds jus soli, while Europe debates excluding male Ukrainian refugees from its protection. This is not a simple comparison—the legal contexts are very different. But there is a convergence of issues: who is protected, and under what conditions? The United States has responded today with the 1868 text. Europe responds with the electoral pressures of 2026. This is not the same level of institutional grounding.

What Roberts Actually Said

Roberts’s statement—“It was soil, not blood, that would determine citizenship”—is a verdict that will go down in American constitutional history. It is a direct response to Trump, who had made restricting birthright citizenship a campaign issue centered on national loyalty and parental origin. Roberts says: The Constitution chooses soil. Not because it’s more convenient or more modern. Because it’s the explicit choice the framers of the 14th Amendment made in 1868, in the wake of Dred Scott—the most shameful decision in the history of the Supreme Court—to declare that American soil produces Americans, without restriction based on race, origin, or parental status.

The June 30, 2026, decision does not settle all the political battles over immigration in the United States. It does not end the debate over borders, enforcement, or immigration policy. But it locks in a constitutional answer to one of the most fundamental questions: who is born an American. The answer—six out of nine votes, including that of the Chief Justice himself—is the one the Constitution has provided for the past 158 years. Trump tried to change it with the stroke of a pen. Roberts upheld it with the rule of law. In a state governed by the rule of law, this is how it works. That is why states governed by the rule of law are worth defending.

Trump waited in the courtroom to see the Court he had partially appointed. The Court told him, 6-3, that the 14th Amendment means what it has meant since 1868. There is no more sober way to describe what happened. And in that sobriety—in the Court’s refusal to bow to the authority of the executive branch—there is something that many democracies around the world view with a mixture of admiration and envy. The United States has its divisions. But its institutions sometimes hold firm exactly when they’re needed most.

By Maxime Marquette, columnist