Deleted user
Lawyer
posted 4 years ago
If the child has proper documents, the specifics of which depend on the child's citizenship and the purpose of entering the US, nothing will happen.
If the visit is temporary, the child needs the same documents as any temporary visitor with the same citizenship. If the parent intends to remain in the US indefinitely, the child should have an immigrant visa, in which case the child will become a US citizen on arrival.