The individual citizen has no federal constitutional right to vote for electors for the President of the United States ... U. S. Const., Art. II, §1. This is the source for the statement in McPherson v. Blacker, 146 U. S. 1, 35 (1892), that the State legislature’s power to select the manner for appointing electors is plenary; it may, if it so chooses, select the electors itself...

.. [146 U.S. 1, 38] : The fifteenth amendment exempted citizens of the United States from discrimination in the exercise of the elective franchise on account of race, color, or previous condition of servitude. The right to vote in the states comes from the states, but the right of exemption from the prohibited discrimination comes from the United States. The first has not been granted or secured by the constitution of the United States, but the last has been. U. S. v. Cruikshank, 92 U.S. 542 ; U.S. v. Reese, Id. 214. , Id. 214. 

The Fifteenth Amendment does not confer the right of suffrage upon any one. It prevents the States, or the United States, however, from giving preference, in this particular, to one citizen of the United States over another on account of race, color, or previous condition of servitude ... Previous to this amendment, there was no constitutional guaranty against this discrimination: now there is.

In Minor v. Happersett, 21 Wall. 178, we decided that the Constitution of the United States has not conferred the right of suffrage upon any one, .... the right of suffrage is not a necessary attribute of national citizenship; .... The right to vote in the States comes from the States; but the right of exemption from the prohibited discrimination comes from the United States. The first has not been granted or secured by the Constitution of the United States; but the last has been.