When Lincoln was 48 years he was elected to the U.S. Senate of the Republican  party. Lincoln opposed slavery considering  it a necessary evil.He had a reputation as a fighter against slavery and it defined him as the presidential candidate of the Republican Party . American people associate his identity with diligence and honesty. Lincoln won the election and became the president the USA twice.  He insisted that Congress passed 13 Amendment to the US Constitution which prohibits slavery in America. Abraham Lincoln  was the central historical figure in the minds of the American people. He prevented the collapse of the United States during the civil war between southern and northern states.  During his presidency was built the transcontinental railroad to the Pacific Ocean, was built  a new banking system, agrarian problem was solved.   His personal qualities  in many ways helped to mobilized the forces of the state and to reunite the country. 14 April 1865 year actor entered the presidential box during  the performance and shot Licoln in the head. The next day Lincoln died without regaining consciousness . Millions of americans came to see the funeral train which was 2 weeks  from Washington to Springfield.  In Washington  monument to Abraham Lincoln in the gratitude of the American people. Lincoln is still  considered the most intelligent president .   After Lincoln's  assassination , the US economy has been the most emerging economies of the world  for a long time. And this helped the country  become a world leader in the early 20th century.