Citizenship Clause in the context of "Dred Scott v. Sandford"

Citizenship of the United States is a legal status that entails citizens with specific rights, duties, protections, and benefits in the United States. It serves as a foundation of fundamental rights derived from and protected by the Constitution and laws of the United States, such as freedom of expression, due process, the rights to vote, live and work in the United States, and to receive federal assistance.

There are two primary sources of citizenship: birthright citizenship, in which persons born within the territorial limits of the United States (except American Samoa) are presumed to be a citizen, or—providing certain other requirements are met—born abroad to a United States citizen parent, and naturalization, a process in which an eligible legal immigrant applies for citizenship and is accepted. The first of these two pathways to citizenship is specified in the Citizenship Clause of the Fourteenth Amendment of the Constitution which reads:

United States citizenship can be acquired by birthright in two situations: by virtue of the person's birth within United States territory while under the jurisdiction thereof (jus soli) or because at least one of their parents was a U.S. citizen at the time of the person's birth (jus sanguinis). Birthright citizenship contrasts with citizenship acquired in other ways, for example by naturalization.

Birthright citizenship is explicitly guaranteed to anyone born under the legal "jurisdiction" of the U.S. federal government by the Citizenship Clause of the Fourteenth Amendment to the United States Constitution (adopted July 9, 1868), which states:

The Fourteenth Amendment (Amendment XIV) to the United States Constitution was adopted on July 9, 1868, as one of the Reconstruction Amendments. Considered one of the most consequential amendments, it addresses citizenship rights and equal protection under the law at all levels of government. The Fourteenth Amendment was a response to issues affecting freed slaves following the American Civil War, and its enactment was bitterly contested. States of the defeated Confederacy were required to ratify it to regain representation in Congress. The amendment, particularly its first section, is one of the most litigated parts of the Constitution, forming the basis for landmark Supreme Court decisions, such as Brown v. Board of Education (1954; prohibiting racial segregation in public schools), Loving v. Virginia (1967; ending interracial marriage bans), Roe v. Wade (1973; recognizing federal right to abortion until overturned in 2022), Bush v. Gore (2000; settling 2000 presidential election), Obergefell v. Hodges (2015; extending right to marry to same-sex couples), and Students for Fair Admissions v. Harvard (2023; prohibiting affirmative action in most college admissions).

The amendment's first section includes the Citizenship Clause, Privileges or Immunities Clause, Due Process Clause, and Equal Protection Clause. The Citizenship Clause broadly defines citizenship, superseding the Supreme Court's decision in Dred Scott v. Sandford (1857), which held that Americans descended from African slaves could not become American citizens. The Privileges or Immunities Clause was interpreted in the Slaughter-House Cases (1873) as preventing states from impeding federal rights, such as the freedom of movement. The Due Process Clause builds on the Fifth Amendment to prohibit all levels of government from depriving people of life, liberty, or property without substantive and procedural due process. Additionally, the Due Process Clause supports the incorporation doctrine, by which portions of the Bill of Rights have been applied to the states. The Equal Protection Clause requires each state to provide equal protection under the law to all people, including non-citizens, within its jurisdiction.