Abraham Lincoln (/ˈlɪŋkən/; February 12, 1809 – April 15, 1865) was an American statesman and lawyer who served as the 16th president of the United States (1861–1865). Lincoln led the nation through its greatest moral, constitutional, and political crisis in the American Civil War. On October 5, 1818, Nancy Lincoln died of milk sickness, leaving 11-year-old Sarah in charge of a household that included her father, 9-year-old Abraham, and Dennis Hanks, Nancy's 19-year-old orphaned cousin. The year's elections showed the strong opposition to the Kansas–Nebraska Act, and in the aftermath, Lincoln sought election to the United States Senate.