Task: Text Categorization
Input (English): This man claimed that the doctrine of popular sovereignty could coexist with the Dred Scott decision during an explanation of his Freeport Doctrine. This man led a faction of a party whose other faction was led by John C. Breckenridge in the 1860 presidential election. Known as ""The Little Giant,"" this politician was instrumental getting the Kansas-Nebraska Act passed. For 10 points, name this Democratic Illinois Senator who engaged in a famous series of debates in 1858 with Abraham Lincoln.
Output (English): History