Andrew Johnson (December 29, 1808 –  July 31, 1875) was the 17th president of the United States, serving from 1865 to 1869. He assumed the presidency as he was vice president at the time of the assassination of Abraham Lincoln. Johnson was a Democrat who ran with Lincoln on the National Union ticket, coming to office as the Civil War concluded. She was not often seen during her husband's presidency; their daughter Martha usually served as official hostess.Johnson's tailoring business prospered during the early years of the marriage, enabling him to hire help and giving him the funds to invest profitably in real estate. Although Democratic President Martin Van Buren was defeated by former Ohio senator William Henry Harrison, Johnson was instrumental in keeping Tennessee and Greene County in the Democratic column.