Conflicts between the power of the federal government and states’ rights strained American politics throughout the antebellum era. During the 1840s and 1850s, the most consistent source of tension on the issue stemmed from northerners refusing to comply with fugitive slave laws. As early as the 1780s, Pennsylvania passed laws that made it illegal to take a black person from the state for the purpose of enslaving them. In the majority opinion, excerpted here, Supreme Court justice Joseph Story decided that the national fugitive slave act overruled Pennsylvania’s law.

This is a writ of error to the Supreme Court of Pennsylvania, brought under the 25th section of the judiciary act of 1789, ch. 20, for the purpose of revising the judgment of that Court, in a case involving the construction of the Constitution and laws of the United States.

The facts are briefly these: The plaintiff … was indicted … for having, with force and violence, taken and carried away from [Pennsylvania] to the state of Maryland, a certain negro woman, named Margaret Morgan, with a design and intention of selling and disposing of, and keeping her as a slave or servant for life, contrary to a statute of Pennsylvania, passed on the 26th of March, 1826. That statute in the first section, in substance, provides, that if any person or persons shall from and after the passing of the act, by force and violence take and carry away, or cause to be taken and carried away, and shall by fraud or false pretense, seduce, or cause to be seduced, or shall attempt to take, carry away, or seduce any negro or mulatto from any part of that commonwealth, with a design and intention of selling and disposing of, or causing to be sold, or of keeping and detaining, or of causing to be kept and detained, such negro or mulatto as a slave or servant for life, or for any term whatsoever; every such person or persons, his or their aiders or abettors, shall, on conviction thereof, be deemed guilty of a felony, and shall forfeit and pay a sum not less than five hundred, nor more than one thousand dollars; and moreover, shall be sentenced to undergo a servitude for any term or terms of years, not less than seven years nor exceeding twenty-one years; and shall be confined and kept to hard labor, &c….

Few questions which have ever come before this Court involve more delicate and important considerations; and few upon which the public at large may be presumed to feel a more profound and pervading interest. We have accordingly given them our most deliberate examination; and it has become my duty to state the result to which we have arrived, and the reasoning by which it is supported….

There are two clauses in the Constitution upon the subject of fugitives, which stand in juxtaposition with each other, and have been thought mutually to illustrate each other. They are both contained in the second section of the fourth article, and are in the following words: “A person charged in any state with treason, felony, or other crime, who shall flee from justice, and be found in another state, shall, on demand of the executive authority of the state from which he fled, be delivered up, to be removed to the state having jurisdiction of the crime.”

“No person held to service or labor in one state under the laws thereof, escaping into another, shall in consequence of any law or regulation therein, be discharged from such service or labor; but shall be delivered up, on claim of the party to whom such service or labor may be due.”

The last clause is that, the true interpretation whereof is directly in judgment before us. Historically, it is well known, that the object of this clause was to secure to the citizens of the slaveholding states the complete right and title of ownership in their slaves, as property, in every state in the Union into which they might escape from the state where they were held in servitude. The full recognition of this right and title was indispensable to the security of this species of property in all the slaveholding states; and, indeed, was so vital to the preservation of their domestic interests and institutions, that it cannot be doubted that it constituted a fundamental article, without the adoption of which the Union could not have been formed. Its true design was to guard against the doctrines and principles prevalent in the non-slaveholding states, by preventing them from intermeddling with, or obstructing, or abolishing the rights of the owners of slaves.

…. if the Constitution had not contained this clause, every non-slaveholding state in the Union would have been at liberty to have declared free all runaway slaves coming within its limits, and to have given them entire immunity and protection against the claims of their masters; a course which would have created the most bitter animosities, and engendered perpetual strife between the different states. The clause was, therefore, of the last importance to the safety and security of the southern states; and could not have been surrendered by them without endangering their whole property in slaves. The clause was accordingly adopted into the Constitution by the unanimous consent of the framers of it; a proof at once of its intrinsic and practical necessity.

… The clause manifestly contemplates the existence of a positive, unqualified right on the part of the owner of the slave, which no state law or regulation can in any way qualify, regulate, control, or restrain. The slave is not to be discharged from service or labor, in consequence of any state law or regulation….

Upon these grounds, we are of opinion that the act of Pennsylvania upon which this indictment is founded, is unconstitutional and void. It purports to punish as a public offence against that state, the very act of seizing and removing a slave by his master, which the Constitution of the United States was designed to justify and uphold. The special verdict finds this fact, and the State Courts have rendered judgment against the plaintiff in error upon that verdict. That judgment must, therefore, be reversed, and the cause remanded to the Supreme Court of Pennsylvania; with directions to carry into effect the judgment of this Court rendered upon the special verdict in favor of the plaintiff…

Richard Peters, Report of the Case of Edward Prigg against the Commonwealth of Pennsylvania… (Philadelphia: 1842), 74, 76-78, 91-92

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