To win the war, President Lincoln had to have popular support. The reunion of North and South required, first of all, a certain degree of unity in the North. But the North contained various groups with special interests of their own. Lincoln faced the task of attracting to his administration the support of as many divergent groups and individuals as possible. Accordingly, he gave much of his time and attention to politics, which in one of its aspects is the art of attracting such support. Fortunately for the Union cause, he was a president with rare political skill. He had the knack of appealing to fellow politicians and talking to them in their own language. He had a talent for smoothing over personal differences and holding the loyalty of men antagonistic to one another. Inheriting the spoils system, he made good use of it, disposing of government jobs in such a way as to strengthen his administration and further its official aims.

The opposition party remained alive and strong. Its membership included war Democrats and peace Democrats, often called “Copperheads,” a few of whom collaborated with the enemy. Lincoln did what he could to cultivate the assistance of the war Democrats, as in securing from Congress the timely approval of the Thirteenth Amendment. So far as feasible, he conciliated the peace Democrats. He heeded the complaints of one of them, Governor Horatio Seymour of New York, in regard to the draft quota for that state. He commuted the prison sentence of another, Congressman Clement L. Vallandigham of Ohio, to banishment within the Confederate lines. In dealing with persons suspected of treasonable intent, Lincoln at times authorized his generals to make arbitrary arrests. He justified this action on the ground that he had to allow some temporary sacrifice of parts of the Constitution in order to maintain the Union and thus preserve the Constitution as a whole. He let his generals suspend several newspapers, but only for short periods, and he promptly revoked a military order suppressing the hostile Chicago Times. In a letter to one of his generals he expressed his policy thus:

You will only arrest individuals and suppress assemblies or newspapers when they may be working palpable injury to the military in your charge, and in no other case will you interfere with the expression of opinion in any form or allow it to be interfered with violently by others. In this you have a discretion to exercise with great caution, calmness, and forbearance.

Considering the dangers and provocations of the time, Lincoln was quite liberal in his treatment of political opponents and the opposition press. He was by no means the dictator critics often accused him of being. Nevertheless, his abrogating of civil liberties, especially his suspension of the privilege of the writ of habeas corpus, disturbed Democrats, Republicans, and even members of his own cabinet. In the opinion of a soldier from Massachusetts, the president, “without the people having any legal means to prevent it, is only prevented from exercising a Russian despotism by the fear he may have of shocking too much the sense of decency of the whole world.” Even Lincoln’s friend Orville Hickman Browning believed the arrests ordered by the president were “illegal and arbitrary, and did more harm than good, weakening instead of strengthening the government.” Yet Lincoln defended his actions, arguing that the Constitution provided for the suspension of such liberties “in cases of Rebellion or Invasion, [when] the public Safety may require it.” Moreover, posed Lincoln with rhetorical flare, “Must I shoot a simpleminded soldier boy who deserts” and “not touch a hair of a wilely agitator who induces him to desert?”

Within his own party, Lincoln confronted factional divisions and personal rivalries that caused him as much trouble as did the activities of the Democrats. True, he and most of his fellow partisans agreed fairly well upon their principal economic aims. With his approval, the Republicans enacted into law the essentials of the program he had advocated from his early Whig days—a protective tariff; a national banking system; and federal aid for internal improvements, in particular for the construction of a railroad to the Pacific Coast. The Republicans disagreed among themselves, however, on many matters regarding the conduct and purposes of the war. Two main factions arose: the “Radicals” and the “Conservatives.” Lincoln himself inclined in spirit toward the Conservatives, but he had friends among the Radicals as well, and he strove to maintain his leadership over both. In appointing his cabinet, he chose his several rivals for the 1860 nomination and, all together, gave representation to every important party group. Wisely he included the outstanding Conservative, Seward, and the outstanding Radical, Salmon P. Chase. Cleverly he overcame cabinet crises and kept these two opposites among his official advisers until Chase’s resignation in 1864.

Lincoln had to deal with even more serious factional uprisings in Congress. The big issue was the “reconstruction” of the South. The seceded states of Louisiana, Arkansas, and Tennessee having been largely recovered by the federal armies, Lincoln late in 1863 proposed his “ten percent plan,” according to which new state governments might be formed when 10 percent of the qualified voters had taken an oath of future loyalty to the United States. The Radicals rejected Lincoln’s proposal as too lenient, and they carried through Congress the Wade-Davis Bill, which would have permitted the remaking and readmission of states only after a majority had taken the loyalty oath. When Lincoln pocket-vetoed that bill, its authors published a “manifesto” denouncing him.

Lincoln was already the candidate of the “Union” (that is, the Republican) party for reelection to the presidency, and the Wade-Davis manifesto signalized a movement within the party to displace him as the party’s nominee. He waited quietly and patiently for the movement to collapse, but even after it had done so, the party remained badly divided. A rival Republican candidate, John C. Frémont, nominated much earlier by a splinter group, was still in the field. Leading Radicals promised to procure Frémont’s withdrawal if Lincoln would obtain the resignation of his conservative postmaster general, Montgomery Blair. Eventually Frémont withdrew and Blair resigned. The party was reunited in time for the election of 1864.

In 1864, as in 1860, Lincoln was the chief strategist of his own electoral campaign. He took a hand in the management of the Republican Speakers’ Bureau, advised state committees on campaign tactics, hired and fired government employees to strengthen party support, and did his best to enable as many soldiers and sailors as possible to vote. Most of the citizens in uniform voted Republican. He was reelected with a large popular majority (55 percent) over his Democratic opponent, General George B. McClellan.

In 1864 the Democratic platform called for an armistice and a peace conference, and prominent Republicans as well as Democrats demanded that Lincoln heed Confederate peace offers, irregular and illusory though they were. In a public letter, he stated his own conditions:

Any proposition which embraces the restoration of peace, the integrity of the whole Union, and the abandonment of slavery, and which comes by and with an authority that can control the armies now at war against the United states will be received and considered by the Executive government of the United States, and will be met by liberal terms on other substantial and collateral points.

When Conservatives protested to him against the implication that the war must go on to free the enslaved, even after reunion had been won, he explained, “To me it seems plain that saying reunion and abandonment of slavery would be considered, if offered, is not saying that nothing else or less would be considered, if offered.” After his reelection, in his annual message to Congress, he said, “In stating a single condition of peace, I mean simply to say that the war will cease on the part of the government, whenever it shall have ceased on the part of those who began it.” On February 3, 1865, he met personally with Confederate commissioners on a steamship in Hampton Roads, Virginia. He promised to be liberal with pardons if the South would quit the war, but he insisted on reunion as a precondition for any peace arrangement. In his Second Inaugural Address he embodied the spirit of his policy in the famous words “with malice toward none; with charity for all.” His terms satisfied neither the Confederate leaders nor the Radical Republicans, and so no peace was possible until the final defeat of the Confederacy.