How did congress attempt to resolve dispute between North and South regarding slavery in territories?

Congress attempted to resolve the dispute between the North and South over slavery in the territories through several measures, including the Missouri Compromise of 1820, which admitted Missouri as a slave state and Maine as a free state, establishing a line that divided free and slave territories. The Compromise of 1850 further addressed the issue by allowing popular sovereignty in newly acquired territories, enabling settlers to decide on the legality of slavery. Additionally, the Kansas-Nebraska Act of 1854 repealed the Missouri Compromise and intensified the conflict through violent confrontations in "Bleeding Kansas." These attempts ultimately failed to create a lasting solution, leading to increased sectional tensions.