This document discusses different models of federalism in the United States and debates which level of government should have more control over certain issues. It outlines that the national government is responsible for issues like national defense and foreign policy, while states handle elections and public safety. It also describes different forms of federalism over time, from cooperative to new and coercive federalism. The document argues that some issues like immigration are best handled at the national level due to cross-state impacts, while others like minimum wage may be better left to state regulation to avoid large economic fluctuations. Overall, it conveys that federalism has adapted over history and both national and state governments rely on each other.