What Is a Natural-Born Citizen? The Presidential Eligibility Clause Nobody Has Fully Defined
The Constitution says the president must be a "natural born citizen" — but never defines what that means. The Founders undear(--text-light);font-size:1rem;max-width:640px;margin:0 0 8px;"> The Constitution says the president must be a "natural born citizen" — but never defines what that means. The Founders understood what they meant in 1787. Two centuries later, as America has grown more diverse and candidates with complex citizenship histories have run for president, the question has become more contested.
- The Constitution requires the president to be a "natural born citizen" but never defines the term — and the Supreme Court has never ruled on its meaning for presidential eligibility.
- The most widely accepted interpretation is citizen at birth, which includes those born on US soil and those born abroad to at least one US citizen parent.
- Kamala Harris (born Oakland, CA) was clearly eligible under birthright citizenship; Ted Cruz (born in Canada to a US mother) was almost certainly eligible but never litigated.
- The only office requiring natural-born citizenship is the presidency (and vice presidency via the 12th Amendment) — senators, representatives, and cabinet members can be naturalized citizens.
Presidential Eligibility Controversies
| Candidate | Circumstance | Consensus |
|---|---|---|
| Barack Obama | Born in Hawaii (US state); father Kenyan; "birther" claims his birth certificate was fake | Clearly eligible; born on US soil; birther claims thoroughly debunked |
| Kamala Harris | Born in Oakland, CA; parents on student visas from India and Jamaica | Clearly eligible; born on US soil; 14th Amendment birthright citizenship applies |
| Ted Cruz | Born in Calgary, Canada; US citizen mother; Cuban citizen father | Almost certainly eligible; citizen at birth through mother; not definitively litigated |
| Marco Rubio | Born in Miami, FL; parents were Cuban nationals, not yet citizens | Clearly eligible; born on US soil; parents' citizenship irrelevant for jus soli |
| John McCain | Born in Panama Canal Zone to US military parents; zone was US-controlled territory | Senate passed non-binding resolution in 2008 saying he was eligible; courts never ruled |
The Birthright Citizenship Debate in 2025-26
On his first day back in office in January 2025, Trump signed an executive order purporting to end birthright citizenship for children born in the US to parents who are neither citizens nor lawful permanent residents. Federal courts immediately blocked the order. The 14th Amendment states "All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens." Courts have interpreted this to include virtually everyone born on US soil.
In Trump v. CASA (2025), the Supreme Court addressed the legality of Trump's birthright citizenship executive order, with justices across the ideological spectrum skeptical that an executive order could override the 14th Amendment. The case also raised questions about nationwide injunctions. If birthright citizenship were eliminated or narrowed, the definition of "natural born citizen" for presidential eligibility would become newly complex for children of non-citizens born in the US.
The US uses primarily jus soli ("right of the soil") — citizenship by place of birth — supplemented by jus sanguinis ("right of blood") for children born abroad to US citizen parents. Most of the world uses jus sanguinis primarily. The debate over birthright citizenship is fundamentally a debate about which principle should define American membership. The Constitution's text strongly supports jus soli, as established in US v. Wong Kim Ark (1898).
Frequently Asked Questions
Can a naturalized citizen ever become president?
No, under the current Constitution. Naturalized citizens — those who were not citizens at birth and obtained citizenship later — are ineligible to be president or vice president. The natural-born citizen requirement was explicitly aimed at preventing foreign-born individuals from assuming the executive. Famous naturalized citizens like Arnold Schwarzenegger (born in Austria) and Madeleine Albright (born in Czechoslovakia) were constitutionally ineligible for the presidency. Changing this would require a constitutional amendment.
Why did the Founders include the natural-born citizen requirement?
The natural-born citizen requirement was included primarily to prevent foreign influence on the new nation's executive. Alexander Hamilton proposed in the Federalist Papers that the commander-in-chief should have no ties of loyalty to foreign nations. John Jay in a letter to George Washington specifically recommended the requirement. The Founders were concerned about European monarchies or aristocracies attempting to install a sympathetic leader in the new republic. They included a grandfather clause for themselves since all of the first generation of Americans were technically British-born.
Does the natural-born citizen requirement apply to the vice president?
Yes, indirectly. The 12th Amendment requires vice-presidential candidates to meet the same qualifications as presidential candidates, which includes the natural-born citizen requirement. This means any naturalized citizen who becomes vice president could not constitutionally succeed to the presidency — creating an unusual situation where a line of succession could skip a VP. In practice, all major-party vice-presidential nominees in the modern era have been natural-born citizens, so the question has remained theoretical.
