In the United States this danger is doubly great because of the interdependence of the general government and the particular States. Judicial process may issue from a State court against those who oppose its execution under claim of authority from the United States; or from a federal Court against those who oppose its execution under claim of authority from a State. Some instances of such conflicts of jurisdiction have been already mentioned.[Footnote: Chap. X.] When the Supreme Court of the United States reverses a judgment of a State court, it can either[Footnote: U. S. Revised Statutes, Sec. 709.] itself render the judgment which the State court ought to have rendered, and issue execution, or remand the cause to it with directions that this be done. If the latter course be taken, the directions may be disobeyed. A Georgia court was guilty of this contumacy in the case of Worcester _v._ Georgia.[Footnote: 6 Peters' Reports, 515, 596.] If the former course be taken, the service of the execution may be resisted by the power of the State. Worcester was illegally confined in the Georgia penitentiary. The sentence against him had been set aside and the indictment adjudged to furnish no ground of prosecution. But if the Supreme Court had rendered a judgment dismissing the prosecution, and given a writ to the marshal directing him to set Worcester at liberty, the officer would have found the prison doors shut in his face. Every prison is a fortress, so built as to prevent rescue from without as well as escape from within. To lay siege to one would be too great an enterprise for the marshal to undertake without military assistance. For this the President could have been called upon. But he might have refused it. If so, the judgment of the judicial department would have proved inoperative, simply because the officer charged with the duty of rendering it operative had declined to fulfil that duty. The Supreme Court, in the Worcester case, probably had reason to believe that if it had directed a call on President Jackson for a military force it would have been refused. It is reported that the President, in private conversation, intimated as much. Possibly he might have been justified in the refusal. South Carolina was on the brink of war with the United States. Georgia was her next neighbor, and might have been induced to make common cause with her, if Jackson had battered down the doors of her penitentiary to release a man who, her courts insisted, had been properly convicted of a serious crime. A court can do nothing short of justice. The executive power, perhaps, may sometimes rightly act or decline to act from motives of national policy.