Whether the Fourteenth Amendment's Privileges or Immunities Clause makes the Fifth Amendment privilege against compelled self-incrimination enforceable against the States.
Holding
No. The privilege against self-incrimination is not a privilege or immunity of national citizenship protected against state action by the Fourteenth Amendment.
Reasoning
The Court reaffirmed the basic premise that the Bill of Rights originally restricted only the federal government. It treated the Slaughter-House Cases as establishing that the Fourteenth Amendment's Privileges or Immunities Clause protects rights of national citizenship, not the general privileges and immunities that arise from state citizenship.
Twining v. New Jersey had specifically held that the privilege against self-incrimination was not protected against the States through the Privileges or Immunities Clause, either as a right of national citizenship or merely because it appears in the federal Bill of Rights. The Court regarded that conclusion, later reaffirmed in Palko v. Connecticut, as settled doctrine consistent with federalism.