The ratification of the Constitution was, to a significant extent, a defining of the lines of authority between the state and federal governments. Over recent years, the Supreme Court has decided a number of cases that address this historical relationship between the federal government and the states. This book discusses state and federal legislative power generally, and will focus on a number of these 'federalism' cases. Issues addressed include congressional power under Article I and the Fourteenth Amendment; limits on congressional power, such as the tenth Amendment; and state sovereign immunity under the Eleventh Amendment. It also presents significant events during the history of America and defines the so-called Dual Federalism, Co-operative Federalism, Creative Federalism and Contemporary Federalism.