Why Southern delegates left the 1860 democratic convention in Charleston?

Southern delegates left the 1860 Democratic Convention in Charleston primarily due to deep divisions over the issue of slavery. The party was split between Northern Democrats, who favored popular sovereignty, and Southern Democrats, who wanted a stronger federal protection of slavery. When the convention refused to adopt a pro-slavery platform, the Southern delegates felt their interests were not being represented and ultimately walked out in protest, leading to the fragmentation of the Democratic Party. This division significantly impacted the outcome of the 1860 presidential election.