What caused the split in the democratic vote in the presidential election in 1860?

The electoral split between Northern and Southern Democrats was emblematic of the severe sectional split, particularly over slavery, and in the months following Lincoln’s election (and before his inauguration in March 1861) seven Southern states, led by South Carolina on December 20, 1860, seceded, setting the stage for the American Civil War (1861–65).

Explanation:

the answer is 250 percent.

which empire had the greatest influence on the history and cultural development of russia?