The repeal of the Missouri Compromise during the administration of President Pierce (May, 1854), followed, as it was three years afterwards, by a decision of the Supreme Court of the United States, that Congress could not constitutionally prohibit slavery in a Territory of the States, gave a vast impetus to the tendencies which were already bringing about a consolidation of most of the elements of the anti-slavery feeling of the North into a single political party. When Mr. Buchanan became the nominee of the Democratic party for the Presidency, although the repeal of the Missouri Compromise had already taken place, the decision of the Supreme Court in the celebrated case of “Dred Scott” had not occurred,[59] and consequently the Republican party, for this and other reasons, had not acquired sufficient force to enable it to elect its candidate, General Fremont. But during the administration of Mr. Buchanan, the scenes which occurred in Kansas and which were direct consequences of the repeal of the Missouri Compromise, with the added excitement which followed the announcement by a majority of the judges of the Supreme Court of doctrines which the people of the North would not accept, there was a field for sectional political action, such as the Union had never before known. So that when the Republican party, in the spring of 1860, assembled its delegates in convention at Chicago, for the nomination of its candidates for the Presidency and the Vice Presidency, adopted a “platform” on which no Southern man of any prominence could place himself, and selected Northern candidates for both offices, it was plain that the time had come when there was to be a trial of political strength between the two sections of the Union. Footnote 59: This case was decided in March, 1857, just after Mr. Buchanan’s inauguration. The “Chicago platform,” on which Mr. Lincoln was nominated and elected as the candidate of the Republican party, while repudiating with great precision the idea that Congress could in any way act upon slavery in the States, contained the following resolution on the subject of slavery in the Territories of the United States: “That the normal condition of all the territory of the United States is that of freedom; that as our republican fathers, when they had abolished slavery in all our national territory, ordained that 'no person should be deprived of life, liberty, or property without due process of law,' it becomes our duty, by legislation, whenever such legislation is necessary, to maintain this provision of the Constitution against all attempts to violate it; and we deny the authority of Congress, of a Territorial legislature, or of any individuals, to give legal existence to slavery in any Territory of the United States.”