The Supreme Court split over birthright citizenship boiled into a public debate between Justices Ketanji Brown Jackson and Clarence Thomas, each staking a starkly different claim about what the 14th Amendment meant in 1868 and what it should mean today; Jackson argued for a broad, universal reach while Thomas emphasized domicile and allegiance, framing the disagreement in historical and legal terms that matter for policy and politics.
Justice Jackson’s concurrence framed the issue as more than a technical argument; she sees it as a defense of inclusive citizenship tied to the Reconstruction era’s moral project. She insisted the Citizenship Clause was meant to cover everyone born on U.S. soil, a reading that reaches children of immigrants present here unlawfully. That stance turns on a broad view of the Fourteenth Amendment’s purpose.
“Freed Blacks fought for the shared humanity of all people. And the Great Emancipator eventually foresaw that the only path forward that could prevent a return — in any form — to slavery and race-based subordination was to link the fates of all,” Jackson wrote. “Of course, the ultimate irony is that for all the talk about the detestable Dred Scott decision, the Government and [Thomas] propose a return to its core tenet. Their bottom line is that, for certain people, being born on American soil will not suffice to confer citizenship.”
The Dred Scott decision of 1857 is the ugly backdrop of this exchange, the case that once declared people of African descent outside the Constitution’s protections. Jackson uses that history to accuse Thomas of advancing an argument with echoes of exclusion. The reference is meant to raise the stakes and highlight how fraught questions of birthright and race have been in American law.
Justice Thomas answered with a narrower, historically textured take, insisting the postwar Congress acted to correct Dred Scott but not to extend citizenship to those not domiciled here. “After the Civil War, the Reconstruction Congress overruled Dred Scott, first with the Civil Rights Act of 1866, then with the Citizenship Clause of the Fourteenth Amendment,” Thomas wrote. “Both the Civil Rights Act and the Citizenship Clause guaranteed citizenship to persons born and domiciled in the United States regardless of their race. Neither guaranteed citizenship to persons who were not domiciled in the United States.”
On facts and legal concepts Thomas leaned into the role of domicile and allegiance, arguing those matter for who counts as fully subject to U.S. jurisdiction. “Blacks were entitled to citizenship because they were Americans. They had no other homeland, owed no allegiance to any foreign power, and were subject to no other authority,” the justice went on. “The same could not be said for the children of foreign temporary visitors. Foreign temporary visitors were attached to their home country, lacked similar bonds to this country, and would not be called upon in time of war.”
Jackson rejected that account as too cramped and missing the point of Reconstruction’s corrective mission, labeling the approach myopic and historically off base. “Despite his longstanding endorsement of a ‘colorblind’ Constitution, Justice Thomas now surprisingly suggests that the Citizenship Clause was a race-conscious remedial measure, relating only to ‘freed slaves such as Dred Scott,’” she wrote. “It is for this reason, he says, that ‘children who were born in the United States but [to parents] not domiciled here’ are not entitled to claim birthright citizenship. But that narrow vision of the Fourteenth Amendment bears little relationship to the history of its ratification. Even worse, Justice Thomas’s telling elides the entire point of the Second Founding.”
Jackson doubled down on the idea that the Reconstruction Amendments reset the nation against caste and subordination in broad terms rather than offering a narrow fix for slavery alone. “The Reconstruction Amendments were an anticaste, antisubordination reset for the Nation, not a mere spot treatment for the dark stain of slavery,” Jackson asserted. That line frames the debate as one over national identity and moral continuity, not just statutory text.
The clash between a textualist concern for domicile and an expansive, restorative reading makes this case about more than one factual scenario; it’s about which method the Court will use when constitutional language meets modern migration realities. Both views carry consequences for law and politics, and the decision that emerges will shape who is counted as American at birth for years to come.
