The presidency of Andrew Johnson began on April 15, 1865, when Andrew Johnson became President of the United States upon the assassination of President Abraham Lincoln, and ended on March 4, 1869. 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. Although Republicans expressed anger with his actions, the 1867 elections generally went Democratic. Nevertheless, once Congress met in November, the Judiciary Committee reversed itself and passed a resolution of impeachment against Johnson. After much debate about whether anything the president had done was a high crime or misdemeanor, the standard for impeachment under the Constitution, the resolution was defeated in the House of Representatives.