Why did people from missouri come to kansas and vote in 1855?

they wanted to make sure kansas became pro-slave.
missouri had not allowed its citizens to vote on the slavery issue.
missouri people hated kansas settlers
they wanted to make sure kansas stayed a free state.

People from Missouri came to Kansas and voted in 1855 because they wanted to make sure Kansas became pro-slave. These people became known as "border ruffians", and the violence that they generated was called "Bleeding Kansas".

Explanation:

Bleeding Kansas was a series of violent events in the United States in the mid-nineteenth century. They related to abolitionist Free-Staters and advocates of slavery called "Border Ruffians". The incident took place in the Kansas territory and the villages on the western border of the state of Missouri roughly between 1854 and 1858, and was one of the reasons for the Civil War. At the basis of the conflict was the question of the accession of Kansas as a free state or slave state to the American union. In that sense, Bleeding Kansas was a proxy war between the Northern and Southern United States over slavery in the nation. The term "Bleeding Kansas" was coined by Horace Greeley of the New York Tribune.

The United States struggled for a long time to find a balance between the interests of slave owners and abolitionists. The incidents that were later called Bleeding Kansas were triggered by the Kansas-Nebraska Act of 1854. It annulled the Missouri compromise and introduced the concept of popular sovereignty instead. This term stated as an apparently democratic idea that the inhabitants of every territory or state had to decide whether they wanted to live in a free or slave state. In any case, a mass immigration of activists from both parties towards Kansas took place. At one point Kansas had two separate governments, each with its own constitution, although only one of them was recognized by the federal state. On January 29, 1861, Kansas joined the union as a free state. This was less than three months before the start of the Civil War with the attack on Fort Sumter.

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