The USSR extended its sphere of influence into Yugoslavia and Albania by supporting the communist parties in those countries. Yugoslavia separated from the USSR later on after a fight between those who supported the USSR way of Communism, that is Stalin, and those who supported the socialistic way, that is Tito.
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What part are you asking for help with?
Progressive reformers targeted voting fraud.
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The north used the rising number of immigrants to staff the industrial economy (factory jobs, warehouse jobs, etc...) the south felt no need to employ immigrants on their plantations because the invention of the cotton mill had made slavery a more economical option.
Explanation:
Because maybe bad things will happen or if there is a war