The Freeport Doctrine is a principle articulated by Stephen A. Douglas during the Lincoln-Douglas debates in 1858, asserting that territories could effectively exclude slavery by not adopting laws to protect it, regardless of federal laws. This concept connected to the growing sectional conflict as it provided a legal pathway for territories to reject slavery, thus influencing the political landscape leading up to the Election of 1860 and the subsequent secession of Southern states.
The Freeport Doctrine emerged during the 1858 Illinois Senate debates between Abraham Lincoln and Stephen A. Douglas, known as the Lincoln-Douglas Debates. In a response to Lincoln at Freeport, Illinois, Douglas articulated this doctrine to reconcile his support for popular sovereignty with the Dred Scott decision, which ruled that Congress could not prohibit slavery in the territories.
The Freeport Doctrine significantly impacted the Democratic Party, contributing to its split and weakening prior to the 1860 presidential election. It attempted to allow territories to exclude slavery despite the Supreme Court's ruling, thus alienating Southern Democrats. This doctrine played a role in framing the political discourse around states' rights and slavery, setting the stage for the Civil War.