"Meanwhile, some migrant farmers from southern states brought a small number of slaves with them into the territory. In Nebraska the people never voted for slavery, but people coming here from the South brought slaves with them."
http://en.wikipedia.org/wiki/History_of_slavery_in_Nebraskamycritters2, indeed, the Kansas-Nebraska Act itself was a railroad "deal" allowed by Southern states to kill the Missouri Compromise and set the stage for the Civil War.
The bigger issue is how all of us today have benefited from hundreds of years of unpaid slave labor. You might read up on how white wealth passed from generation and from corporation to corporation up until today derived from that wicked, wicked forced labor of women, men and little children.
How petty, how small the state house of Nebraska looks today. Shameful. Absolutely shameful.