If you were a supporter of slavery, you would most likely vote for Stephen A. Douglas (democratic party) in the 1858 Illinois Senate race.
Answer: The treatment of Native Americans
Explanation:
"They were angry at German leaders for losing the war to the Allies" is the best way to sum up how German people felt about their nation after World War I.
It would interfere with their trade alliances.
Communism leads to the government taking control of resources and industry. If it spread into areas the US did business, they could lose the ability to control resources and trade. This would eventually impact our political power and any military advantages the US had in Europe.