At the Democratic National Convention held in Charleston, South Carolina, in April 1860, the party split into two factions that separately reassembled in Baltimore in June and nominated rival candidates for president and vice president. The group often described as the Southern Democrats nominated John C. Breckindridge, a Kentucky native then serving as vice president as its presidential candidate. The group generally referred to as the Northern Democrats nominated Stephen A. Douglas, a United States senator from Illinois as its candidate. The Republican Party nominated Abraham Lincoln, a well-known opponent of slavery, for president. The new Constitutional Union Party nominated a former Whig congressman from Tennessee, John Bell, whose party platform included nothing specific on any issues and merely pledged to preserve the Constitution and the Union.