It was one of his most deliberately formed, openly avowed and widely known opinions. It is incredible that Lincoln and his advisors were in doubt how he would answer the question. Whatever may be our view of the soundness of his doctrine, it is not just to the ablest debater and foremost statesman of the time to say that he was taken by surprise and driven into a corner by a question which, as he was taken by surprise and driven into a corner by a question which, as he said then, he had answered a hundred times from every stump in Illinois.

The third debate was held at Jonesboro, near the southern boundary of the State, on September 15th.

Douglas, in his opening speech, stated anew his now familiar argument that the Republican party was sectional, threatening to disrupt the Union by its slavery agitation, while the Democratic party was national, with a wholesome creed, alike applicable in all latitudes. Lincoln and Trumbull had conspired to abolitinize the old parties and secure seats in the Senate. Lincoln's doctrine of the house divided against itself was examined and the implied threat emphasized that Southern institutions must be overthrown and a dead level of uniformity reached in order that the Government should stand. The finality of the Dred Scott decision and the exclusion of negroes from the Declaration of Independence were insisted on. Much of the speech was devoted to the local and transient questions of Illinois politics.

Lincoln, replying to the charge that the slavery agitation was the result of the aggressive attitude of Northern Abolitionists, again insisted that the propagandists of slavery were the aggressors, having attempted to change it from a local and declining institution and spread it through all the Territories, removing it "from the basis on which the fathers left it to the basis of its perpetuation and nationalization." The agitation began with the repeal of the Missouri Compromise.

"Who," he asked, "did that? Why, when we had peace under the Missouri Compromise, could you not have left it alone?"He quoted Douglas' speech in the Senate on June 9th, 1856, in which he had declared that "whether the people could exclude slavery prior to the formation of a Constitution or not, was a question to be decided by the Supreme Court. * * * * When he says, after the Supreme Court has decided the question, that the people may yet exclude slavery by any means whatever, he does virtually say that it is not a question for the Supreme Court. * * * the proposition that slavery cannot enter a new country without police regulations is historically false. * * * Slavery was originally planted upon this continent without these police regulations. * * * How came the Dred Scott decision to be made? It was made upon the case of a negro being taken and actually held in slavery in Minnesota Territory, claiming his freedom because the act of Congress prohibited his being so held there. Will the Judge pretend that Dred Scott was not held there without police regulations? * * * * This shows that there is vigor enough in slavery to plant itself in a new country, even against unfriendly legislation. It takes not only law, but the enforcement of the law, to keep it out. This is the history of this country upon the subject. * * * The first thing a Senator does is swear to support the Constitution of the United States. Suppose a Senator believes, as Douglas does, that the Constitution guarantees the right to hold slaves in a Territory.

How can he clear his oath unless he supports such legislation as is necessary to enable the people to enjoy their property? Can you, if you swear to support the Constitution, and believe that the Constitution establishes a right, clear your oath without giving it support? * * * * There can be nothing in the words, 'support the Constitution,' if you may run counter to it by refusing to support it. * * * * And what I say here will hod with still more force against the Judge's doctrine of unfriendly legislation. * ** Is not Congress itself bound to give legislative support to any right that is established in the United States Constitution? AMember of Congress swears to support the Constitution * * * and if he sees a right established by that Constitution which needs specific legislative protection, can he clear his oath without giving that protection. * * * If I acknowledge * * * that this (Dred Scott) decision properly construes the Constitution, I cannot conceive that I would be less than a perjured man if I should refuse in Congress to give such protection to that property as in its nature is needed."He then stated his fifth interrogatory: If slave-holding citizens of the United States Territory should need and demand congressional legislation for the protection of their slave property in such Territory, would you as a Member of Congress, vote for or against such legislation?