Andrew Johnson was the 17th president of the United States from April 15, 1865, after the assassination of President Abraham Lincoln, to March 4, 1869. The 17th president, Johnson was a member of the Democratic Party before the Civil War and had been Lincoln's 1864 running mate on the National Union ticket, which was supported by Republicans and War Democrats. Johnson took office as the Civil War came to a close, and his presidency was dominated by the aftermath of the war. As president, Johnson attempted to build his own party of Southerners and conservative Northerners, but he was unable to unite his supporters into a new party. Republican Ulysses S. Grant succeeded Johnson as president.
Johnson, who was himself from Tennessee, favored quick restoration of the seceded states to the Union. He implemented his own form of Presidential Reconstruction – a series of proclamations directing the seceded states to hold conventions and elections to re-form their civil governments. His plans did not give protection to the former slaves, and he came into conflict with the Republican-dominated Congress. When Southern states returned, many of their old leaders passed Black Codes to deprive the freedmen of many civil liberties, congressional Republicans refused to seat legislators from those states and established military districts across the South. Johnson vetoed their bills, and congressional Republicans overrode him, setting a pattern for the remainder of his presidency.