Mr. Kennedy, of Maryland, addressed the Senate, arguing that the acquisition of Cuba is subversive of the best interests of the South. Referring to the aspect of our domestic affairs, he considered that innovations had been ingrafted on the policy of this government, which inevitably betokens its dissolution. The doctrine of State Rights did well while we were a homogeneous people, bound together by common troubles; but that day has passed. The unbounded prosperity of this country, its fertile lands, and increasing wealth, have attracted to it people from every clime. There is no common interest to bind us together. The Constitution and the Supreme Court are derided, and the Constitution threatens to be but a rope of sand, unable to bind, from having no power to punish infractions of that Constitution. He had been derided as an old Federalist, and the men who so denounced him had now on the table two bills more dangerous, in consolidating the power in the hands of one man, than any that ever emanated from the old Federal party. They had also a bill to give away the public lands to the sweepings of European lazar-houses, to squat thereon, and, under an easy franchise, to control that government, before they know a word of our language, or have one idea toward a comprehension of our institutions. Yet, while offering this extraordinary bonus to the discontented spirits of the old world, they refuse to vote for and denounce the old soldiers' bill. How comes it, he asked, that there is such a diversity of opinion in the democratic party, marching under one banner, and professing common principles?