However, the situation wasn't as simple as a straight nomination. Here's what happened:
* Deep Divisions: The Democratic Party was deeply divided over the issue of slavery. Northern Democrats favored popular sovereignty (allowing residents of territories to decide whether or not to allow slavery), while Southern Democrats were staunchly pro-slavery.
* Charleston Convention: At the Charleston convention, the delegates couldn't agree on a platform. They were unable to agree on the wording of a plank regarding the protection of slavery in the territories. This led to a deadlock and a failure to nominate a candidate.
* Baltimore Convention: The Democrats reconvened in Baltimore, Maryland, in June 1860. Douglas was nominated there.
While Southern delegates were present at the Charleston convention, they refused to support Douglas, as they believed his position on popular sovereignty would eventually lead to the abolition of slavery. This led to a split in the Democratic Party.
Important Note: The split in the Democratic Party was one of the key factors contributing to the election of Abraham Lincoln and the subsequent secession of Southern states, leading to the American Civil War.