As a result of the passage of the Kansas-Nebraska Act, the Missouri Compromise was nullified, two new territories were established, and popular sovereignty was authorized.
Additionally, it sparked a bloody revolt known as "Bleeding Kansas" when advocates for and opponents of slavery flocked to the territory ahead of the vote.
This is further explained below.
Generally, The territories of Kansas and Nebraska were established by the Kansas-Nebraska Legislation of 1854, which was a territorial organic act. Senator Stephen A. Douglas, a Democrat, wrote it; the 33rd Congress approved it; and President Franklin Pierce signed it into law.
In conclusion, The Missouri Compromise was overturned by the Kansas-Nebraska Act, which also established two additional territories and authorized the exercise of popular sovereignty.
It also resulted in a violent revolt that came to be known as "Bleeding Kansas," which occurred when advocates of slavery and opponents of slavery surged into the territory in an attempt to swing the vote.
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