1) Libya - Conflict between President's role as commander-in-chief and Congress's power to declare war
2) Debt ceiling - Tension between Congress's power to borrow money and obligation to pay debts
3) Obamacare - Debate around extent of Congress's power to regulate interstate commerce
4) Immigration - Questions around interpretation of citizenship clause in 14th Amendment
The document discusses ongoing policy and legal debates around the scope and limits of powers granted to different branches of government by the Constitution. It analyzes how the Constitution has been interpreted and applied to modern issues like healthcare, debt, and immigration.