This was his last important speech in the Senate. It was delivered under circumstances of awful solemnity. He seemed not deeply impressed with the gravity of the situation and was still interested in it chiefly as a party problem. He did not expect the baptism of blood that followed, but cheerfully looked forward to compromise and reconciliation. The Northern Democrats might yet rescue the country by mediating a truce between radical Republicans and radical Southern Democrats. In the present state of affairs who, but himself, the chief of these neutrals, could lead this great movement? His mental habits were those of the politician. He saw all event primarily in their relation to party tactics. Now that the earth began to rock beneath his feet, he suspected that it was only a theatrical earthquake and prepared to seize upon every advantage that might be gathered out of the confusion. He could not comprehend the deep and unappeasable passions that rent the Nation. The grim earnestness of his fellow-countrymen was as inconceivable to him as the demoniac enthusiasm of the great Apostle was to the scoffing Athenians who heard him on the Hill of Mars. But, as the great tragedy deepened and darkened, he quit his political speculations and began to think, not of the success of his party, but of the possibility of saving the Union from imminent wreck. He returned to Illinois and addressed the legislature, urging energetic support of the war, and on May 1st was welcomed back to Chicago by an immense assembly of all parties. He was escorted to the great hall in which Lincoln had been nominated and there addressed the people. He spoke not as a politician but as a generous patriot. He denounced in unmeasured terms the Southern conspiracy which had resulted in secession and now had ripened into open and bloody rebellion. He saw the treason of the South no longer as a mere element in an interesting political game, but as the blackest of human crimes and an awful menace to the life of the Republic. "There are only two sides to the question," he said. "Every man must be for the United States or against it. There can be no neutrals in this war; only patriots or traitors. * * * It is a sad task to discuss questions so fearful as civil war; but sad as it is, bloody and disastrous as I expect it will be, I express it as my conviction before God that it is the duty of every American citizen to rally around the flag of his country."