The Lincoln–Douglas debates (also known as The Great Debates of 1858) were a series of seven debates between Abraham Lincoln, the Republican Party candidate for the United States Senate from Illinois, and incumbent Senator Stephen A. Douglas, the Democratic Party candidate. These debates focused primarily on slavery: specifically, whether it would be allowed in the new states to be formed from the territory acquired through the Louisiana Purchase and the Mexican Cession. Douglas, as part of the Democratic party, held that the decision should be made by the residents of the new states themselves rather than by the federal government (popular sovereignty). Lincoln argued against the expansion of slavery, yet stressed that he was not advocating its abolition where it already existed. This ebook contains the first of those debates, held on August 21st, 1858, in Ottawa, Illinois.