.
.
It violated the Missouri Compromise.
They strongly disapproved of the act.
they wanted to create a majority antislavery place
The Kansas-Nebraska Act also led to "Bleeding Kansas," a mini civil war that erupted in Kansas in 1856. Northerners and Southerners flooded Kansas in 1854 and 1855, determined to convert the future state to their view on slavery.
Because it could have allowed some new slave-states in the West.
They got to choose whether the territory would have slavery by the way of popular sovereignty, which is the people get to have the choice.
So the region would become a slave-free state
Kansas-Nebraska act
The Kansas-Nebraska Act of the U.S. Congress said voters in these territories to choose whether they would allow slavery or not. Thousands of antislavery northerners went into Kansas and voted to forbid slavery, then returned home.
Kansas and Nebraska
Slaves