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II. Naturalization and Acquired Citizenship
Not all American citizens are born on U.S. soil. Millions acquire citizenship through naturalization, a legal process by which immigrants become citizens after meeting certain requirements. These typically include a period of residency, knowledge of English and U.S. civics, and an oath of allegiance.
Naturalized citizens enjoy nearly all the same rights as those born in the United States. They can vote, hold public office (with one major exception), serve in the military, and represent the country in international arenas. The distinction between natural-born and naturalized citizens is minimal in most areas of public life, reflecting the American ideal that citizenship—not ancestry—is the basis of belonging.
A natural-born citizen is generally understood to be someone who is a citizen at birth, either by being born on U.S. soil or, in some cases, by being born abroad to U.S. citizen parents. Naturalized citizens—those who acquire citizenship after birth—are excluded from presidential eligibility.
The rationale behind this requirement dates back to the founding era, when concerns about foreign influence were paramount. The framers of the Constitution wanted to ensure that the nation’s highest office would not be held by someone with divided loyalties or strong ties to another country.
While the presidency has strict birthplace-related requirements, other political offices are more inclusive. Members of Congress, for example, must be U.S. citizens, but they do not need to be natural-born. The Constitution requires that representatives be citizens for at least seven years and senators for at least nine years.