Except the section of the act preparatory to the admission of Missouri into the Union, approved March 6, 1820, which was superseded by the principles of the legislation of 1850, commonly called the compromise measure, and is declared inoperative.

A similar provision with a like reservation was added to the section providing for the election of a delegate from Nebraska. A prolonged and brilliant debate followed in the Senate, and finally in place of the original reservation the following was adopted, on motion of Senator Stephen A. Douglas, by a vote of 35 to 10:

Except the section of the act preparatory to the admission of Missouri into the Union, approved March 6, 1820, which, being inconsistent with the principle of non-intervention by Congress with slavery in the States and territories, as recognized by the legislation in 1850 (commonly called the compromise measure), is hereby declared inoperative and void, it being the true intent and meaning of this act not to legislate slavery into any territory or State, nor to exclude it therefrom, but to leave the people thereof perfectly free to form and regulate their domestic institutions in their own way, subject only to the constitution of the United States.

Senator Chase then moved to add to the above the following:

Under which the people of the territory, through their appropriate representatives, may, if they see fit, prohibit the existence of slavery therein.

This amendment was voted down, yeas 10, nays 36, the Senate thus declaring its understanding that the people of the new territories should not be allowed to prohibit slavery previous to their admission as a State. The bill passed on the morning of March 4th, by a vote of 37 to 14. In the House a separate bill had been introduced, but when it came up for consideration the Senate bill was substituted for it—by a parliamentary trick its opponents were prevented from offering amendments—and the bill was passed, yeas 113, nays 100. It went back to the Senate, in form as an original measure, but in effect the Senate bill, and on May 26 was finally passed by that body and was approved by President Pierce on May 30. The debate had been a memorable one; for the friends of Liberty, while they resisted to the last the surrender of what had been once bought for Freedom, joyfully recognized the fact that this act would in its logic make every compromise repealable, and thus kill in the womb all future political bargainings. Benjamin F. Wade said in the Senate that "the violation of the plighted faith of the nation would precipitate a conflict between liberty and slavery; and that, in such a conflict, it will not be liberty that will die in the nineteenth century. You may call me an Abolitionist if you will; I care little for that, for if an undying hatred to slavery constitutes an Abolitionist, I am that Abolitionist. If man's determination at all times and at all hazards, to the last extremity, to resist the extension of slavery, or any other tyranny, constitutes an Abolitionist, I before God believe myself to be that Abolitionist." William H. Seward said: "You are setting an example which abrogates all compromises.... It has been no proposition of mine to abrogate them now; but the proposition has come from another quarter—from an adverse one. It is about to prevail. The shifting sands of compromise are passing from under my feet, and they are now, without agency of my own, taking hold again on the rock of the constitution. It shall be no fault of mine if they do not remain firm." Charles Sumner closed his protest against this removal of "the landmarks of freedom" by declaring the measure to be "at once the worst and best bill on which Congress ever acted—the worst inasmuch as it is a present victory for slavery, and the best bill because it prepares the way for the 'All hail hereafter,' when slavery must disappear. Sorrowfully I bend before the wrong you are about to perpetrate. Joyfully I welcome all the promises of the future."

The response of the North to the abrogation of the Missouri compromise justified these predictions. To this overthrow of a solemn compact for the purpose of opening a vast empire to attempts at slave colonization, men of every shade of anti-slavery conviction made answer by eagerly seeking ways of uniting in effective resistance to such a crime against civilization. Amid an excitement, which grew profounder as the contest progressed, and which was fed by the press, the pulpit, and the lyceum, and was organized by public meetings, the demand became daily stronger for political action on the basis of uncompromising hostility to the aggressions of the slave power. Before the Kansas-Nebraska controversy was finished the Whig party had ceased to exist, the Democracy had become a pro-slavery organization, the era of compromise had passed away, and the young giant of Republicanism stood on the threshold of the territories commanding slavery to stand back. This vast and far-reaching political revolution was accomplished through the wholesale sacrifice of cherished ties by the friends of free institutions and through their hearty union in the new party of Freedom. The State in which this fusion of anti-slavery opinion into Republicanism was first accomplished was Michigan, and the Republican party as a distinct organization was born and christened under the oaks of Jackson on the 6th of July, 1854. Political opinion in that State was peculiarly ripe for this step. Its Whigs were with but rare exceptions staunch anti-slavery men. Even Senator Cass's great influence had failed to keep all the Democrats submissive to pro-slavery compromises. The Free Soilers were strong in character and several thousands in number. Thus when the opportunity came for decisive action it found the men ready.

The Free Democrats of Michigan, encouraged by the increase in their vote in 1852, and responding to an appeal of the "Independent Democrats in Congress" (signed by Salmon P. Chase, Charles Sumner, Joshua R. Giddings, Gerrit Smith, Edward Wade, and Alexander De Witt) for popular resistance to the attack on the Missouri compact, held the first political convention of 1854 in that State. It met in Jackson, on February 22d, under a call issued at Detroit on January 12, and signed by U. Tracy Howe, Hovey K. Clarke, Samuel Zug, Silas M. Holmes, S. A. Baker, S. B. Thayer, S. P. Mead, J. W. Childs, and Erastus Hussey, forming the state central committee of that party. The convention was called to order by Hovey K. Clarke, and it organized with Wm. T. Howell of Hillsdale as president. The committee on resolutions consisted of Hovey K. Clarke, Fernando C. Beaman, Kinsley S. Bingham, E. Hussey, Nathan Power, D. C. Leach, and L. Moore, and a committee of twenty-four was appointed to nominate a State ticket. The committee on resolutions reported a platform prepared by Hovey K. Clarke, declaring freedom national and slavery sectional, and denouncing the attempt to repeal the Missouri compromise as an infamous outrage upon justice, humanity and good faith. The nominating committee submitted this list of candidates for the State offices:

Governor—Kinsley S. Bingham.
Lieutenant-Governor—Nathan Pierce.
Secretary of State—Lovell Moore.
State Treasurer—Silas M. Holmes.
Auditor-General—Philotus Hayden.
Attorney-General—Hovey K. Clarke.
Commissioner of Land Office—Seymour B. Treadwell.
Superintendent of Public Instruction—Elijah H. Pilcher.
Member of Board of Education—Isaac P. Christiancy.