On the 29th of August, the Democratic National Convention met at Chicago. Horatio Seymour was its permanent President; that same Governor of New York whom the 4th of July, 1863, almost at the moment when Vicksburg and Gettysburg had brought great encouragement to the Union cause, and when public necessity demanded the enforcement of the Draft in order to drive the Rebel invader from Northern soil and bring the Rebellion speedily to an end--had threateningly said to the Republicans, in the course of a public speech, during the Draft-riots at New York City: "Remember this, that the bloody, and treasonable, and revolutionary doctrine of public necessity can be proclaimed by a mob as well as by a Government. * * * When men accept despotism, they may have a choice as to who the despot shall be!" In his speech to this Democratic-Copperhead National Convention, therefore, it is not surprising that he should, at this time, declare that "this Administration cannot now save this Union, if it would." That the body which elected such a presiding officer,--after the bloody series of glorious Union victories about Atlanta, Ga., then fast leading up to the fall of that great Rebel stronghold, (which event actually occurred long before most of these Democratic delegates, on their return, could even reach their homes)--should adopt a Resolution declaring that the War was a "failure," was not surprising either. That Resolution--"the material resolution of the Chicago platform," as Vallandigham afterward characters it, was written and "carried through both the Subcommittee and the General Committee" by that Arch-Copperhead and Conspirator himself.--[See his letter of October 22, 1864, to the editor of the New York News,] It was in these words: "Resolved, That this Convention does explicitly declare as the sense of the American People, that after four years of failure to restore the Union by the experiment of War, during which, under the pretense of a military necessity, or War-power higher than the Constitution, the Constitution itself has been disregarded in every part, and public Liberty and private right alike trodden down and the material prosperity of the Country essentially impaired--Justice, Humanity, Liberty, and the public welfare demand that immediate efforts be made for a cessation of hostilities, with a view to an ultimate Convention of the States, or other peaceable means, to the end that at the earliest practicable moment Peace may be restored on the basis of the Federal Union of the States." With a Copperhead platform, this Democratic Convention thought it politic to have a Union candidate for the Presidency. Hence, the nomination of General McClellan; but to propitiate the out-and-out Vallandigham Peace men, Mr. Pendleton was nominated to the second place on the ticket.