How did national leaders attempt to compromise before lincoln took office?

When the Northern politicians tried to compromise, the South chose civil war. National leaders attempted to compromise before Lincoln took office but their inability to compromise led to a Civil War. A radical abolitionists group was formed, Northern politicians like, President, Abraham Lincoln, gave Southerners no choice but to secede. Lincoln was a Republican. And the Republican Party opposed slavery. When he took office several months later, he faced the most severe crisis in American history, A civil war. But its slavery and the refusal of Southern slaveholders to compromise on slavery, that launched the Civil War.