The delegates to the Constitutional Convention embraced the difficult duty of crafting a government that appropriately distributed the power between the national government and the states. For the Founders, the principle of federalism was a means of protecting liberty by limiting and dividing government power. This lesson explores the principle of federalism, how it is constructed in the Constitution, and  the relationship between national and state powers.

Congress' power to regulate interstate commerce, granted in the Commerce Clause, is often invoked as justification for laws regulating a wide variety of economic activities. How much power does the Commerce Clause allow the federal government to have over the states? This lesson examines this question by looking at the principle behind this clause, the Founders intentions, and how the Supreme Court has interpreted the clause throughout American History.