What did Lincoln's election signify for the southern states?

Lincoln's election in 1860 significantly alarmed many Southern states because they perceived his victory as an existential threat to the institution of slavery, which was integral to their economic and social systems. Lincoln was a member of the Republican Party, which opposed the expansion of slavery into the territories. This opposition led Southern leaders to fear that his presidency would eventually lead to the abolition of slavery altogether.

As a result, discussions of secession became prevalent in the South soon after his election. Several states viewed his presidency as a direct challenge to their rights and interests, prompting them to consider leaving the Union in order to protect those interests. This fear galvanized Southern political thought and ultimately led to the secession of several states, starting with South Carolina in December 1860, which was a direct response to Lincoln's election.

The option that reflects this understanding of the political climate following Lincoln's election is the one that identifies his election as a threat that prompted discussions of secession.