Background: Andrew Johnson (December 29, 1808 -  July 31, 1875) was the 17th President of the United States, serving from 1865 to 1869. Johnson became president as he was vice president at the time of the assassination of Abraham Lincoln. A Democrat who ran with Lincoln on the National Union ticket, Johnson came to office as the Civil War concluded. The new president favored quick restoration of the seceded states to the Union.
Context: Johnson left North Carolina for Tennessee, traveling mostly on foot. After a brief period in Knoxville, he moved to Mooresville, Alabama. He then worked as a tailor in Columbia, Tennessee, but was called back to Raleigh by his mother and stepfather, who saw limited opportunities there and who wished to emigrate west. Johnson and his party traveled through the Blue Ridge Mountains to Greeneville, Tennessee. Andrew Johnson fell in love with the town at first sight, and when he became prosperous purchased the land where he had first camped and planted a tree in commemoration.  In Greeneville, Johnson established a successful tailoring business in the front of his home. In 1827, at the age of 18, he married 16-year-old Eliza McCardle, the daughter of a local shoemaker. The pair were married by Justice of the Peace Mordecai Lincoln, first cousin of Thomas Lincoln, whose son would become president. The Johnsons were married for almost 50 years and had five children: Martha (1828), Charles (1830), Mary (1832), Robert (1834), and Andrew Jr. (1852). Though she suffered from Tuberculosis, Eliza supported her husband's endeavors. She taught him mathematics skills and tutored him to improve his writing. Shy and retiring by nature, Eliza Johnson usually remained in Greeneville during Johnson's political rise. 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. He later boasted of his talents as a tailor, "my work never ripped or gave way." He was a voracious reader. Books about famous orators aroused his interest in political dialogue, and he had private debates on the issues of the day with customers who held opposing views. He also took part in debates at Greeneville College.
Question: Why did he move to TN?. Whats the answer?