Answer:
Many Americans feared that as immigration increased, jobs and housing would become harder to obtain for a number of reasons: There was high unemployment in America after World War One. New immigrants were used to break strikes and were blamed for the deterioration in wages and working conditions.
The United States became an "isolationist" nation because of all the funds it loaned to its European allies during World War I, not to mention all of the US lives that were lost in the war as well. This is because the US felt it was wasting time, money, and American lives on a war that did not affect them.
