Lincoln tenure since March. 1861 until was assassinated on April 1975.1865 he succeeded in bringing the country through the American Civil War. A constitutional crisis. Military and morals of the nation's largest by preserve the union, while stop slave.Lincoln was born in a poor family in the western borders. Most of Lincoln self study and become a lawyer, member of the Whig Party rural law prescribe the Illinois between supervision 1830.1840 after debate in the C.Professor 1858, which makes the country see opposition to expand of the slave system. Lincoln lost the Senate election to the protagonist, Stephen A. Douglas