How did passage of the 17th amendment reflect the condition of the progressive movement?

Who is the plaintiff in united states vs lopez

In italy, the distance between milan in the north and palermo, sicily, in the south is about 550 miles. in the united states, the distance betweenboston, massachusetts, and savannah, georgia, is about 900 miles. do you think the american revolutionaries of 1776 in the 13 colonies faced some of the same challenges as the patriots who struggled for italian unity in the 1860s?  

Which piece of information would most a historian create an interpretation of this photograph of works in a factory?