What happened in Japan before imperialism

How does the power of the supreme court act as a check on the other branches of government

Which effect did the united states supreme court's decision in plessy v. ferguson have? 1. ending segregation in all public schools in america 2. protecting voting rights for african americans by eliminating literacy tests 3. upholding the rights of all citizens to be treated equally by the government 4. authorizing the system that kept black and white people separated

Based on this passage, which issue facing laborers did samuel gompers want to focus on first?