The Whig Party was not primarily divided over slavery, as it was more focused on issues like economic development and internal improvements. However, the party eventually fractured due to debates over slavery, particularly with the rise of the Republican Party, which attracted many former Whigs. In contrast, the Democratic Party was deeply divided along regional lines over the issue of slavery.
Republicans
Free-Soil Party
The Republican Party was and still is anti slavery. Abraham Lincoln, the president that ended slavery, was a Republican. The Democrat Party supported slavery. Many that fought, fought to defend their state regardless of their views on slavery.
The Liberty Party called for an end to slavery. The Liberty Party became the Republican Party.
The political party that stood against the spread of slavery was the newly formed Republican party. The party was emerged to combat the Kansas-Nebraska Act of 1854 which aimed to extend slavery.
free soil party
Republicans
Oregon
The Republican Party of 1860 was divided between the Northern party and the Southern Party. This was do to the Republican's stand on slavery and slave owners rights.
Members of the Whig Party were divided on the subject of slavery. This led to the end of the party in the middle of the 19th century.
Free-Soil Party
The Republican Party, founded in the 1850s, was primarily united in its opposition to the expansion of slavery into the territories. Similarly, the Democratic Party was initially divided over slavery but eventually coalesced around pro-slavery positions, particularly in the South. In contrast, the Whig Party, before it dissolved, struggled with internal divisions over slavery, leading to its decline. Overall, the Republican Party maintained a more consistent stance against slavery compared to other parties of the era.
Sectional lines
In the election of 1852 the Whig Party began to be destroyed. The party was divided on whether or not to allow slavery in the new territories.
The effect of Bleeding Kansas on the Democratic party was that it divided the party in half. One half that wanted to expand slavery and the other group didn't.
The northern Democrats supported Stephen A. Douglas for President in 1860, but the southern Democrats withheld support for Douglas. The South demanded that Douglas repudiate the Freeport Doctrine and support a federal slave law. The Douglas supporters pointed out that to do that would drive the northern Democrats into the Republican Party.
The Republican Party was and still is anti slavery. Abraham Lincoln, the president that ended slavery, was a Republican. The Democrat Party supported slavery. Many that fought, fought to defend their state regardless of their views on slavery.