////Birthright Citizenship (Jus Soli): The Citizenship Clause Doctrine in Section 1 of the Fourteenth Amendment dictates that "All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States." This guarantees citizenship to almost anyone born in U.S. territory, regardless of their parents' immigration status.Citizenship by Blood (Jus Sanguinis): While the Constitution explicitly addresses soil-based citizenship, the U.S. Congress is responsible for passing laws—such as the Child Citizenship Act—that grant automatic citizenship to children born outside the United States if at least one parent is a U.S. citizen