Federalism involves the sharing of power between the federal/national government and state governments. Some key aspects of federalism include: 1) The federal government has expressed powers that are specifically enumerated in the Constitution like coining money and regulating interstate commerce. It also has implied powers that are suggested though not expressly stated, like establishing a national bank. 2) States have reserved powers over areas not given to the federal government like education, welfare, and family law. 3) Both the federal and state governments have concurrent powers like taxation and establishing courts. The Supremacy Clause establishes that federal authority overrides state authority.