I have a DBQ due on monday and I need help brainstorming different ideas in terms of social, political and economic for this prompt. PLEASE HELP!

Prompt: "In the early 19th century, Americans sought to resolve their political disputes through compromise, yet by 1860 this no longer seemed possible. Analyze the reasons for this change. Use the documents and your knowledge of the period 1820-1860 in constructing your response."

It's due monday so please reply ASAP! THANKS A LOT!! :D