What's up guys, i don't post here a lot but i need some serious help on a big term paper for my AP U.S. History class. So the assignment was to make your own document based question regarding anything during the Progressive Era, find documents to support your argument, then answer the question using the documents in an essay. I came up with my question a few days ago and my teacher likes it, but now my dilemma is finding the right documents to support my thesis (which is that they did do a pretty good job in exposing society's wrongs and reforming America). Here's the question:

"To what extent did the muckrakers of Progressive America ameliorate society's problems from 1890-1920"

***any type of help is fine i.e. political cartoons, charts, photographs, documents or even websites that i can find that kind of stuff on***

thanks in advance guys!!! (essay due march 10)