There were serious questions, too, to be decided about negro soldiers, for the South had raised a mighty outcry against the Emancipation Proclamation, especially against the use of the freed slaves as soldiers, vowing that white officers of negro troops would be shown small mercy, if ever they were taken prisoners. No act of such vengeance occurred, but in 1864 a fort manned by colored soldiers was captured by the Confederates, and almost the entire garrison was put to death. Must the order that the War Department had issued some time earlier, to offset the Confederate threats, now be put in force? The order said that for every negro prisoner killed by the Confederates a Confederate prisoner in the hands of the Union armies would be taken out and shot. It fell upon Mr. Lincoln to decide. The idea seemed unbearable to him, yet, on the other hand, could he afford to let the massacre go unavenged and thus encourage the South in the belief that it could commit such barbarous acts and escape unharmed? Two reasons finally decided him against putting the order in force. One was that General Grant was about to start on his campaign against Richmond, and that it would be most unwise to begin this by the tragic spectacle of a military punishment, however merited. The other was his tender-hearted humanity. He could not, he said, take men out and kill them in cold blood for crimes committed by other men. If he could get hold of the persons who were guilty of killing the colored prisoners in cold blood, the case would be different; but he could not kill the innocent for the guilty. Fortunately the offense was not repeated, and no one had cause to criticize his clemency.
Numbers of good and influential men, dismayed at the amount of blood and treasure that the war had already cost, and disheartened by the calls for still more soldiers that Grant's campaign made necessary, began to clamor for peace—were ready to grant almost anything that the Confederates chose to ask. Rebel agents were in Canada professing to be able to conclude a peace. Mr. Lincoln, wishing to convince these northern "Peace men" of the groundlessness of their claim, and of the injustice of their charges that the government was continuing the war unnecessarily, sent Horace Greeley, the foremost among them, to Canada, to talk with the self-styled ambassadors of Jefferson Davis. Nothing came of it, of course, except abuse of Mr. Lincoln for sending such a messenger, and a lively quarrel between Greeley and the rebel agents as to who was responsible for the misunderstandings that arose.
The summer and autumn of 1864 were likewise filled with the bitterness and high excitement of a presidential campaign; for, according to law, Mr. Lincoln's successor had to be elected on the "Tuesday after the first Monday" of November in that year. The great mass of Republicans wished Mr. Lincoln to be reelected. The Democrats had long ago fixed upon General McClellan, with his grievances against the President, as their future candidate. It is not unusual for Presidents to discover would-be rivals in their own cabinets. Considering the strong men who formed Mr. Lincoln's cabinet, and the fact that four years earlier more than one of them had active hopes of being chosen in his stead, it is remarkable that there was so little of this.
The one who developed the most serious desire to succeed him was Salmon P. Chase, his Secretary of the Treasury. Devoted with all his powers to the cause of the Union, Mr. Chase was yet strangely at fault in his judgment of men. He regarded himself as the friend of Mr. Lincoln, but nevertheless held so poor an opinion of the President's mind and character, compared with his own, that he could not believe people blind enough to prefer the President to himself. He imagined that he did not want the office, and was anxious only for the public good; yet he listened eagerly to the critics of the President who flattered his hopes, and found time in spite of his great labors to write letters to all parts of the country, which, although protesting that he did not want the honor, showed his entire willingness to accept it. Mr. Lincoln was well aware of this. Indeed, it was impossible not to know about it, though he refused to hear the matter discussed or to read any letters concerning it. He had his own opinion of the taste displayed by Mr. Chase, but chose to take no notice of his actions. "I have determined," he said, "to shut my eyes, so far as possible, to everything of the sort. Mr. Chase makes a good Secretary, and I shall keep him where he is. If he becomes President, all right. I hope we may never have a worse man," and he not only kept him where he was, but went on appointing Chase's friends to office.
There was also some talk of making General Grant the Republican candidate for President, and an attempt was even made to trap Mr. Lincoln into taking part in a meeting where this was to be done. Mr. Lincoln refused to attend, and instead wrote a letter of such hearty and generous approval of Grant and his army that the meeting naturally fell into the hands of Mr. Lincoln's friends. General Grant, never at that time or any other, gave the least encouragement to the efforts which were made to array him against the President. Mr. Lincoln, on his part, received all warnings to beware of Grant in the most serene manner, saying tranquilly, "If he takes Richmond, let him have it." It was not so with General Fremont. At a poorly attended meeting held in Cleveland he was actually nominated by a handful of people calling themselves the "Radical Democracy," and taking the matter seriously, accepted, although, three months later, having found no response from the public, he withdrew from the contest.
After all, these various attempts to discredit the name of Abraham Lincoln caused hardly a ripple on the great current of public opinion, and death alone could have prevented his choice by the Republican national convention. He took no measures to help on his own candidacy. With strangers he would not talk about the probability of his reelection; but with friends he made no secret of his readiness to continue the work he was engaged in if such should be the general wish. "A second term would be a great honor and a great labor; which together, perhaps, I would not decline," he wrote to one of them. He discouraged officeholders, either civil or military, who showed any special zeal in his behalf. To General Schurz, who wrote asking permission to take an active part in the campaign for his reelection, he answered: "I perceive no objection to your making a political speech when you are where one is to be made; but quite surely, speaking in the North and fighting in the South at the same time are not possible, nor could I be justified to detail any officer to the political campaign... and then return him to the army."
He himself made no long speeches during the summer, and in his short addresses, at Sanitary Fairs, in answer to visiting delegations, and on similar occasions where custom and courtesy obliged him to say a few words, he kept his quiet ease and self-command, speaking heartily and to the point, yet avoiding all the pitfalls that beset the candidate who talks.
When the Republican national convention came together in Baltimore on June 7, 1864, it had very little to do, for its delegates were bound by rigid instructions to vote for Abraham Lincoln.
He was chosen on the first ballot, every State voting for him except Missouri, whose representatives had been instructed to vote for Grant. Missouri at once changed its vote, and the secretary of the convention read the grand total of 506 for Lincoln, his announcement being greeted by a storm of cheers that lasted several minutes.
It was not so easy to choose a Vice-President. Mr. Lincoln had been besieged by many people to make known his wishes in the matter, but had persistently refused. He rightly felt that it would be presumptuous in him to dictate who should be his companion on the ticket, and, in case of his death, his successor in office. This was for the delegates to the convention to decide, for they represented the voters of the country. He had no more right to dictate who should be selected than the Emperor of China would have had. It is probable that Vice-President Hamlin would have been renominated, if it had not been for the general feeling both in and out of the convention that, under all the circumstances, it would be wiser to select some man who had been a Democrat, and had yet upheld the war. The choice fell upon Andrew Johnson of Tennessee, who was not only a Democrat, but had been appointed by Mr. Lincoln military governor of Tennessee in 1862.