Justice Roger B. Taney's Opinion in Dred Scott v. Sanford (1857)
The question is simply this: Can a negro, whose ancestors were imported into this country, and sold as slaves, become a member of the political community formed and brought into existence by the Constitution of the United States, and as such become entitled to all the rights, and privileges, and immunities, guaranteed by that instrument to the citizen? One of which rights is the privilege of suing in a court of the United States in the cases specified in the Constitution. It will be observed, that the plea applies to that class of persons only whose ancestors were Negroes of the African race, and imported into this country, and sold and held as slaves. The only matter in issue before the court, therefore, is whether the descendants of such slaves, when they shall be emancipated, or who are born of parents who had become free before their birth, are citizens of a State, in the sense in which the word citizen is used in the Constitution of the United States… The words 'people of the