In the u. s. supreme court case of guinn v. united states (1915), the court ruled that

In the u.s. supreme court case of guinn v. united states (1915), the court ruled that the grandfather clause was unconstitutional as it violated the equal voting rights guaranteed by the Fifteenth Amendment. In its ruling, the Supreme Court struck down the grandfather clause due to its unconstitutionality.

Americans agreed to the settlement terms established by the mexican government.