Answer:
The Kansas-Nebraska Act set the backdrop for the Dred Scott decision
Step-by-step explanation:
It contributed to the creation of the Republican Party, which was formed in the spring of 1854 explicitly to stop the spread of slavery, and it sparked the “Border War” between Kansas and Missouri, where people came to blows over whether Kansas should enter the Union as a free or slave state. By 1857, when Dred Scott made it to the Supreme Court, the Northern and Southern states already had a tenuous relationship.