The Senate Judiciary Subcommittee on the Constitution heard testimony on the meaning of the 14th Amendment's birthright citizenship clause that grants citizenship to all people born in the United States, regardless of their parents' citizenship status. This hearing occurred ahead of the April 1 Supreme Court oral arguments in [Trump v. Barbara], regarding the merits of President Trump's executive order limiting the privileges of birthright citizenship. Witnesses included legal professionals as well as Alejandro Barranco, the son of an immigrant living in the U.S. illegally who was detained by Immigrations and Customs Enforcement. In 1898, the Supreme Court ruled that birthright citizenship was constitutional in the landmark case of [United States v. Wong Kim Ark], which involved the citizenship of a child born in the U.S. to parents of Chinese descent.