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Southern Democrats is the correct answer.
It was the issue of slavery which mainly divided US into northern and southern states and further Democratic party into southern Democrats and Northern Democrats. The Southern Democrats were pro-slavery and thus challenged the Northwest Ordinance's prohibition of slavery by the late 1850s.
U.S. Labor union did not allow Chinese immigrants to become members.
<u>Explanation:</u>
Labor unions in the United States are organizations that are formed by workers from various industries that are recognized under "<u>US labor law</u>". Labor union opposed immigrants because they thought that the American workers will be undermined.
In the 1850’s, Chinese immigrants established Chinatowns in cities mainly on the western coast of the United States as U.S. Labor union did not allow Chinese immigrants to become members. In 1882, American government passed “Chinese Exclusion Act” to stop Chinese immigrants from becoming American citizens.
Trans-Mississippi was a name of the geographic area west of the Mississippi River<span> during the 19th century.
</span>The geography of this area was inhospitable, dry, rugged, with few trees and extreme weather.The Trans-Mississippi West was the frontier of an urban and industrial society. People, dissatisfied with their everyday lives, look westward and fantasize about simpler and better life.
