Debate over the anti-KKK bill naturally required exposition of Section 1 of the Fourteenth Amendment, and none was better qualified to explain that section than its draftsman, Rep. John A. Bingham (R., Ohio):Mr. Speaker, that the scope and meaning of the limitations imposed by the first section, fourteenth amendment of the Constitution may be more fully understood, permit me to say that the privileges and immunities of citizens of a State, are chiefly defined in the first eight amendments to the Constitution of the United States.... These eight articles... never were limitations upon the power of the States, until made so by the fourteenth amendment. The words of that amendment, "no State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States" are an express prohibition upon every State of the Union .... Id. at pt. 2, Appendix 84 (Mar. 31, 1871).This is a most explicit statement of the incorporation thesis by the architect of the Fourteenth Amendment.
But with the exception of these and a few other restrictions, the entire domain of the privileges and immunities of citizens of the States, as above defined, lay within the constitutional and legislative power of the States, and without that of the Federal government. Was it the purpose of the fourteenth amendment, by the simple declaration that no State should make or enforce any law which shall abridge the privileges and immunities of citizens of the United States, to transfer the security and protection of all the civil rights which we have mentioned, from the States to the Federal government?...The argument we admit is not always the most conclusive which is drawn from the consequences urged against the adoption of a particular construction of an instrument. But when, as in the case before us, these consequences are so serious, so far-reaching and pervading, so great a departure from the structure and spirit of our institutions; when the effect is to fetter and degrade the State governments by subjecting them to the control of Congress, in the exercise of powers heretofore universally conceded to them of the most ordinary and fundamental character; when in fact it radically changes the whole theory of the relations of the State and Federal governments to each other and of both these governments to the people; the argument has a force that is irresistible, in the absence of language which expresses such a purpose too clearly to admit of doubt.
We are convinced that no such results were intended by the Congress which proposed these amendments, nor by the legislatures of the States which ratified them.
United States Supreme Court, SLAUGHTER-HOUSE CASES, 83 U.S. 36 DECEMBER, 1872
Judicial incorporation has been through the due process clause.