
Supreme Court Oral Arguments [25-365] Trump v. Barbara
Apr 1, 2026
Cecillia D. Wang, a civil-rights litigator defending birthright citizenship, and D. John Sauer, a former state solicitor challenging it, square off. They debate original meaning versus long practice, the scope of "subject to the jurisdiction," Wong Kim Ark’s role, domicile versus jus soli, humanitarian and administrative implications, and whether new exceptions to birthright citizenship are constitutionally permissible.
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Government's Domicile Based Theory Of Jurisdiction
- The government argues the Citizenship Clause ties birthright citizenship to parental domicile and allegiance, not mere physical presence on U.S. soil.
- John Sauer cites 19th-century debates and treatises saying temporary sojourners' children were understood not to gain citizenship, distinguishing freed slaves and domiciled residents.
1866 Act Shift Shows Republican Conception Of Allegiance
- Sauer points to the Civil Rights Act of 1866 switching phrasing from not subject to any foreign power to subject to the jurisdiction thereof to reject British allegiance concepts.
- He relies on Senator Trumbull's contemporaneous explanation that jurisdiction meant not owing allegiance to another sovereign.
Court Focuses On Jurisdiction As Allegiance Versus Territorial Power
- Justices repeatedly pressed both advocates on whether 'subject to the jurisdiction' is tied to allegiance, domicile, or the simpler meaning of being subject to U.S. laws.
- The exchange highlights the core interpretive divide between historical-allegiance versus modern-territorial readings.

