The more rapid growth of the free States in population made the contest for the House of Representatives, or for a majority in the Electoral college, utterly hopeless to the South; but the constitutional equality of all the States in the Senate enabled the slave interest to defeat any hostile legislation, and to defeat also any nominations by the President of men who were offensive to the South by reason of their anti-slavery character. The courts of the United States, both supreme and district, throughout the Union, including the clerks and the marshals who summoned the juries and served the processes, were therefore filled with men acceptable to the South. Cabinets were constituted in the same way. Representatives of the government in foreign countries were necessarily taken from the class approved by the same power. Mr. Webster, speaking in his most conservative tone in the famous speech of March 7, 1850, declared that, from the formation of the Union to that hour, the South had monopolized three-fourths of the places of honor and emolument under the Federal Government. It was an accepted fact that the class interest of slavery, by holding a tie in the Senate, could defeat any measure or any nomination to which its leaders might be opposed; and thus, banded together by an absolutely cohesive political force, they could and did dictate terms. A tie-vote cannot carry measures, but it can always defeat them; and any combination of votes that possesses the negative power will in the end, if it can be firmly held, direct and control the positive action of the body to which it belongs. A strong minority, so disciplined that it cannot be divided, will, in the hands of competent leaders, annoy, distract, and often defeat, the majority of a parliamentary body. Much more can one absolute half of a legislative assembly, compactly united, succeed in dividing and controlling the other half, which has no class interest to consolidate it, and no tyrannical public opinion behind it, decreeing political death to any member who doubts or halts in his devotion to one supreme idea.
With one-half of the Senate under the control of the slave-holding States, and with the Constitution declaring that no amendment to it should ever destroy the equality of the States in the Senate, the Southern leaders occupied a commanding position. Those leaders constituted a remarkable body of men. Having before them the example of Jefferson, of Madison, and of George Mason in Virginia, of Nathaniel Macon in North Carolina, and of the Pinckneys and Rutledges in South Carolina, they gave deep study to the science of government. They were admirably trained as debaters, and they became highly skilled in the management of parliamentary bodies. As a rule, they were liberally educated, many of them graduates of Northern colleges, a still larger number taking their degrees at Transylvania in Kentucky, at Chapel Hill in North Carolina, and at Mr. Jefferson's peculiar but admirable institution in Virginia. Their secluded life on the plantation gave them leisure for reading and reflection. They took pride in their libraries, pursued the law so far as it increased their equipment for a public career, and devoted themselves to political affairs with an absorbing ambition. Their domestic relations imparted manners that were haughty and sometimes offensive; they were quick to take affront, and they not infrequently brought needless personal disputation into the discussion of public questions; but they were, almost without exception, men of high integrity, and they were especially and jealously careful of the public money. Too often ruinously lavish in their personal expenditures, they believed in an economical government, and, throughout the long period of their domination, they guarded the Treasury with rigid and unceasing vigilance against every attempt at extravagance, and against every form of corruption.