The annexation of new territories and the continual conflict between different regions led to more splits in America, particularly in the 1850s of the Democratic party. This was over the South's demand for the endorsement of slavery and the West's support of popular sovereignty.
At the democratic party convention, they decided to endorse popular sovereignty, and delegates from some Southern states left the convention, and the ones who remained could not decide on a candidate so they delayed it to the Baltimore convention
We endorse POPULAR SOVEREIGNTY
WE are out
I am a candidate chosen from the Baltimore convention for the Northern democrats
The remaining delegates chose Stephen Douglas in Baltimore, while the states that left met in Richmond and Chose John C Breckinridge. Republican party decided to have Whig ideals and states rights, and chose Abraham Lincoln.
I am the candidate from the Richmond convention from the Southern democrats.
Hi I am an obscure and eloquent candidate with a moderate view on slavery
Lincoln won in 1860 with the most electoral votes, but with ⅖ of popular vote and no majority in congress.
Lincoln was able to become president due to the split in the Democratic party between the North and the South, which led to each selecting their own candidates for office.
Republicans in office!
Lincoln's election was seen as the last straw to the Southerners about their place in the union. This led to the process of secession a short time later, also leading to the eventual Civil War.