Cite as: 533 U. S. 53 (2001)
Opinion of the Court
mother-child relationship, exists between father and child before citizenship is conferred upon the latter.
The importance of the governmental interest at issue here is too profound to be satisfied merely by conducting a DNA test. The fact of paternity can be established even without the father's knowledge, not to say his presence. Paternity can be established by taking DNA samples even from a few strands of hair, years after the birth. See Federal Judicial Center, Reference Manual on Scientific Evidence 497 (2d ed. 2000). Yet scientific proof of biological paternity does nothing, by itself, to ensure contact between father and child during the child's minority.
Congress is well within its authority in refusing, absent proof of at least the opportunity for the development of a relationship between citizen parent and child, to commit this country to embracing a child as a citizen entitled as of birth to the full protection of the United States, to the absolute right to enter its borders, and to full participation in the political process. If citizenship is to be conferred by the unwitting means petitioners urge, so that its acquisition abroad bears little relation to the realities of the child's own ties and allegiances, it is for Congress, not this Court, to make that determination. Congress has not taken that path but has instead chosen, by means of § 1409, to ensure in the case of father and child the opportunity for a relationship to develop, an opportunity which the event of birth itself provides for the mother and child. It should be unobjectionable for Congress to require some evidence of a minimal opportunity for the development of a relationship with the child in terms the male can fulfill.
While the INS' brief contains statements indicating the governmental interest we here describe, see Brief for Respondent 38, 41, it suggests other interests as well. Statements from the INS' brief are not conclusive as to the objects of the statute, however, as we are concerned with the objectives of Congress, not those of the INS. We ascertain the
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