What election of 1860 which presidential candidate most reflected the sourthem position on the expansion of slavery?

In the 1860 election, John C. Breckinridge, the Southern Democratic candidate, most reflected the Southern position on the expansion of slavery. He advocated for the protection and expansion of slavery into the territories, aligning with Southern interests and concerns over the perceived threats from the Republican Party and its anti-slavery stance. Breckinridge's platform emphasized the importance of states' rights and the rights of slaveholders, making him the preferred choice for many Southern voters.