The U.S. Supreme Court is preparing to hear arguments concerning whether the sitting President has the authority to withhold citizenship from children born on American soil to parents residing in the country illegally or temporarily. This case directly challenges the long-standing practice known as birthright citizenship.

Understanding Birthright Citizenship: Jus Soli

Constitutional Foundation in the U.S.

Birthright citizenship in the United States is rooted in the legal concept of jus soli, or the “right of soil.” This principle was formally established in the Constitution following the Civil War, largely to ensure citizenship for formerly enslaved people.

The 14th Amendment clearly states: “All persons born or naturalized in the United States and subject to the jurisdiction thereof, are citizens of the United States.” Exceptions to this rule are currently limited, generally applying only to children born to foreign diplomats stationed in the U.S.

Historical Precedent

A key historical case supporting this interpretation is that of Wong Kim Ark. After traveling abroad, Ark, who was born in the U.S. to Chinese parents, was denied reentry. The Supreme Court ultimately ruled that the 14th Amendment grants citizenship to virtually everyone born within U.S. territory, regardless of their parents’ legal standing.

Global Perspectives on Citizenship by Birth

The Dominance of Jus Sanguinis

While the U.S. adheres to jus soli, this practice is uncommon globally. Only about three dozen nations, predominantly in the Americas, guarantee automatic citizenship based on birthplace.

The majority of countries worldwide follow jus sanguinis, or the “right of blood.” Under this principle, a child’s citizenship is determined by the nationality of their parents, irrespective of where the birth occurs. This is the standard across most of Asia, Africa, and the Middle East.

European Union and Mixed Systems

None of the 27 member states of the European Union currently grant unconditional, automatic citizenship to children born to foreign citizens within their borders. Other nations utilize hybrid systems that factor in residency, ethnicity, or parenthood.

Australia, for instance, modified its policy in August 1986. Children born there after that date can only claim citizenship if one parent is already an Australian citizen or a permanent resident. Germany also previously required parental German citizenship, but its laws have evolved.

Germany's Liberalization Example

Starting in 2024, Germany automatically grants citizenship to children born there to non-German parents, provided one parent has maintained legal residency for over five years with unlimited status. The German government cited studies showing that earlier citizenship improves educational outcomes for children with migration backgrounds.

The Core of the Current Legal Debate

Advocates seeking to restrict birthright citizenship in the U.S. concentrate their arguments on a specific clause within the 14th Amendment: “subject to the jurisdiction thereof.” They contend this phrase permits the government to exclude children born to individuals who are present in the country unlawfully.