Thaddeus Stevens on black suffrage, 1867
From speech of Thaddeus Stevens (R-Pa) in the House of Representatives, January 3, 1867. Congressional Globe, 39th Congress, 2nd session, Jan. 3 1867. 251-252.

Unless the rebel States, before admission, should be made republican in spirit, and placed, under the guardianship of loyal men, all our blood and treasure will have been spent in vain. I waive now the question of punishment which, if we are wise, will still be inflicted by moderate confiscations, both as a reproof and example. Having these States, as we all agree, entirely within the power of Congress, it is our duty to take care that no injustice shall remain in their organic laws. Holding them "like clay in the hands of the potter," we must see that no vessel is made for destruction. Having now no governments, they must have enabling acts. The law of last session with regard to Territories settled the principles of such acts. Impartial suffrage, both in electing the delegates and ratifying their proceedings, is now the fixed rule. There is more reason why colored voters should be admitted in the rebel States than in the Territories. In the States they form the great mass of loyal men. Possibly with their aid loyal governments may be established in most of those States. Without it all are sure to be ruled by traitors; and loyal men, black and white, will be oppressed, exiled, or murdered. There are several good reasons for the passage of this bill [Military Reconstruction Act]. In the first place, it is just. I am now confining my argument to negro suffrage in the rebel States. Have not loyal blacks quite as good a right to choose rulers and make laws as rebel whites? In the second place, it is a necessity in order to protect the loyal white men in the seceded States. The white Union men are in a great minority in each of those States. With them the blacks would act in a body; and it is believed that in each of said States, except one, the two united would form a majority, control the States, and protect themselves. New they are the victims of daily murder. They must suffer constant persecution or be exiled. . . .

Another good reason is, it would insure the ascendancy of the Union party. Do you avow the party purpose? exclaims some horror-stricken demagogue. I do. For I believe, on my conscience, that on the continued ascendency of that party depends the safety of this great nation. If impartial suffrage is excluded in the rebel States then every one of them is sure to send a solid rebel representative delegation to Congress, and cast a solid rebel electoral vote. They, with their kindred Copperheads of the North, would always elect the President and control Congress. While slavery sat upon her defiant throne, and insulted and intimidated the trembling North, the South frequently divided on questions of policy between Whigs and Democrats, and gave victory alternately to the sections. Now, you must divide them between loyalists, without regard to color, and disloyalists, or you will be the perpetual vassals of the free-trade, irritated, revengeful South. For these, among other reasons, I am for negro suffrage in every rebel State. If it be just, it should not be denied; if it be necessary, it should be adopted; if it be a punishment to traitors, they deserve it.