Why did the Democratic Party separate into the Northern Democrats (headed by Stephen Douglas) and the Southern Democrats (headed by John Breckinridge)prior to the 1860 presidential election?
A. The Northern Democrats opposed the Southern Democrats on the expansion ofslavery into foreign territories.
B. The Northern Democrats opposed the Southern Democrats on the issue ofimporting slaves from foreign countries.
C. The Northern Democrats opposed the Southern Democrats on the use ofpopular sovereignty in deciding the slavery issue.
D. The Northern Democrats opposed the Southern Democrats on the issue ofprotecting slavery in all of the newly formed territories.