Oklahoma sought to keep suffrage permanently open to illiterate whites, while closing it to illiterate negroes.

This amendment was declared unconstitutional by the United States Supreme Court in June, 1915, on the ground that a State cannot reestablish conditions existing before the ratification of the Fifteenth Amendment, even though the disfranchising amendment contained no "express words of exclusion" but "inherently brings that result into existence."[1] What the Court will do with other similar constitutional amendments when they are brought before it is not so certain.

All differ somewhat, and it is possible that the Court may let the whole or a part of some of them stand.

If not, it is probable that straight educational and property qualifications will be substituted.

In fact, if the Court disapproves the permanent roll but allows the remainder to stand, educational and property qualifications will prevail in several States.
[Footnote 1: Guinn _vs._ United States, 238 U.S., 347.] All these plans for disfranchisement have accomplished the desired results up to the present time.