Missouri Compromise of 1820 was made by Henry Clay to satisfy both sides of the country (North and South) so he gave each a state for equal representation in the Senate.He also divided the rest of the Lousiana territory to avoid future conflicts.
For future territories I make the 36°,30N line to separate the rest of Louisiana Purchase.
I now to make things even I'll give 1 state to the north and south .
The senator of illinois wanted to build a railroad to western areas.The southerners were furios since now transportation North would be faster making for free states so the senator then proposed that the next territories can be states by popular sovereignty
We will build a railroad from illinois to western territories and in return future territories would be able to choose whether to slave state of free.
Kansas Nebraska Act repealed the 36,30N line and Northerners were angered by this because now slavery was allowed to move North.
After the compromise of 1850 Pro and anti-slavery rushed to Kansas causing a lot of chaos and violence.There were border ruffians that killed anti-slavery settlers. This event was known as bleeding Kansas.
Get your slaves out of here you poor farmer!
You can't make me cause this will soon be a slave state you lazy yankee!