 It is historically well known that the object in the clause in the Constitution of the United States relating to persons owing service and labor in one state escaping into other states 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 prevailing in the non-slaveholding States by preventing them from intermeddling with or obstructing or abolishing the rights of the owners of slaves. (Prigg v. Pennsylvania, 41 U.S. (16 Pet.) 539 (1842), at 540)