This decision of the Supreme Court placed Senator Douglas in a curious dilemma. While it served to indorse and fortify his course in repealing the Missouri Compromise, it, on the other hand, totally negatived his theory by which he had sought to make the repeal palatable, that the people of a Territory, by the exercise of his great principle of popular sovereignty, could decide the slavery question for themselves. But, being a subtle sophist, he sought to maintain a show of consistency by an ingenious evasion. In the month of June following the decision, he made a speech at Springfield, Illinois, in which he tentatively announced what in the next year became widely celebrated as his Freeport doctrine, and was immediately denounced by his political confreres of the South as serious party heterodoxy. First lauding the Supreme Court as "the highest judicial tribunal on earth," and declaring that violent resistance to its decrees must be put down by the strong arm of the government, he went on thus to define a master's right to his slave in Kansas: "While the right continues in full force under the guarantees of the Constitution, and cannot be divested or alienated by an act of Congress, it necessarily remains a barren and a worthless right unless sustained, protected, and enforced by appropriate police regulations and local legislation prescribing adequate remedies for its violation. These regulations and remedies must necessarily depend entirely upon the will and wishes of the people of the Territory, as they can only be prescribed by the local legislatures. Hence, the great principle of popular sovereignty and self-government is sustained and firmly established by the authority of this decision." Both the legal and political aspects of the new question immediately engaged the earnest attention of Mr. Lincoln; and his splendid power of analysis set its ominous portent in a strong light. He made a speech in reply to Douglas about two weeks after, subjecting the Dred Scott decision to a searching and eloquent criticism. He said: