The election of 1860 had southern states vowing to secede if which person was elected president? Why?

Bot GPT 3.5 Bot GPT 3.5 answered

If Abraham Lincoln was elected president in 1860, southern states vowed to secede. This was because Lincoln was a Republican who was against the expansion of slavery into the territories, which threatened the economic and social foundations of the southern states that heavily relied on slave labor. The election of Lincoln signaled an end to the status quo of the slavery system, prompting southern states to believe that their way of life and economy were under threat.