of the Constitution may be more fully understood, permit me to say that the privileges and immunities of citizens of the United States, as contradistinguished from citizens of a State, are chiefly defined in the first eight amendments to the Constitution of the United States. One of the earliest judicial interpretations of the Privileges or Immunities Clause was Garnes v. McCann, Ohio Sup. Ct., in 1871. In it Judge John Day interpreted the clause to protect enumerated constitutional rights such as those listed in the Bill of Rights, but not unenumerated common-law civil rights. He wrote: This [case] involves the equity as to what privileges or immunities are embraced in the inhibition of this clause. We are not aware that this has been as yet judicially settled. The language of the clause, however, taken in connection with other provisions of the amendment, and of the constitution of which it forms a part, affords strong reasons for believing that it includes only such privileges or immunities as are derived from, or recognized by, the constitution of the United States. A broader interpretation opens into a field of conjecture limitless as the range of speculative theories, and might work such limitations of the power of the States to manage and regulate their local institutions and affairs as were never contemplated by the amendment. The Slaughter-House Cases The Privileges or Immunities Clause of the Fourteenth Amendment to the United States Constitution is unique among constitutional provisions in that some scholars believe it was substantially read out of the Constitution in a 5–4 decision of the Supreme Court in the Slaughter-House Cases of 1873. The Clause has remained virtually dormant since, but in 2010 this clause was the basis for the fifth and deciding vote in the case of McDonald v. Chicago, regarding application of the Second Amendment of the United States Constitution to the states. In the Slaughter-House Cases the court recognized two types of citizenship. The rights citizens have by being citizens of the United States are covered under the Privileges or Immunities Clause of the 14th Amendment, while the rights citizens have by being citizens of a state fall under the Privileges and Immunities Clause of Article Four. The Supreme Court did not prevent application of the Bill of Rights to the states via the Privileges or Immunities Clause in Slaughter-House, but rather addressed whether a state monopoly statute violated the