In the cartoon, now-prosperous immigrants object to further immigration to America. The meaning behind the prosperous immigrants' shadows is that there is an underlying secret to how the immigrants became prosperous or their lives are in danger because they are more prosperous than the locals.
Answer: America had placed an embargo on Japan due to their over achieving power and took over most of the South Pacific islands. Japan was wanting to upward/increase its oil for its war effort and saw the Pacific Fleet of the United States as its biggest threat.
3) The Articles of Confederation was replaced by the CONSTITUTION.
The populist party suggested using gold and silver.
