Federal preemption and the Supremacy Clause are crucial concepts in U.S. constitutional law. They establish the hierarchy of laws, with federal law taking precedence over state law when conflicts arise. This unit covers the types of preemption, key Supreme Court cases, and the analysis courts use to determine preemption. The topic delves into the historical development of preemption doctrine and its application in various areas of law. It also explores current debates surrounding the balance between federal and state power, including issues in immigration, environmental regulation, and consumer protection.