Its political results, however, were far more important. Calhoun now came forward to ward off a long conflict in regard to slavery in these territories, by the new doctrine that the Constitution extended to all the national domain, and carried slavery with it--a doctrine which his followers did not, for ten years afterwards, dare to take up and rigorously apply, and which divided the Democratic party of the North. The repeal of the Missouri Compromise and the enactment of the Fugitive Slave Law were only steps in the conflict which was as yet confused, but which was clearing itself for a crisis. The South, like every clamorous suitor, reckless of consequences, obtained wide concessions from an adversary who sought peace and contentment, and who saw clearly the dangers of a struggle outside the limits of constitution and law. * * * * * The Abolitionists, from their first organization, pursued an “irreconcilable” course. They refused to vote for any slaveholder, or for any one who would vote for a slaveholder, and refused all alliances which involved any concession whatever. They more than once, by this course, aided the party most hostile to them, and, in the view of the ordinary politician, were guilty of great folly. They showed, however, what is the power of a body which has a principle and has no ambition, and is content to remain in a minority. Probably if the South had been more moderate, the Abolitionists would have attracted little more notice than a fanatical religious sect; but, as events marched on, they came to stand as the leaders in the greatest political movement of our history. The refusal of the Whig Convention of 1848 to adopt an antislavery resolution, and the great acts above mentioned, together with the popular reaction against a party which, if it had had its way, would never have won the grand territories on the Pacific, destroyed the Whig party. The party managers, enraged at the immense foreign element which they saw added year by year to their adversaries, forming a cohort, as it appeared, especially amenable to party discipline and the dictation of party managers, took up the Native American movement, which had had some existence ever since the great tide of immigration set in. The effort was wrecked on the obvious economic follies involved in it. How could a new country set hindrances against the immigration of labor? Politically, the effect was great in confirming the allegiance of naturalized voters, as a mass, to the Democratic party as the party which would protect their political privileges against malicious attacks. The formation of the Free-Soil party or its development into the Republican party, brought the extension of slavery into the territories, and the extension of its influence in the administration of the government, distinctly forward as the controlling political issue.