Answer:
Article 4 of the Constitution of the United States gives a definition of federalism and its role in the organization of the nation, both by establishing a system of admission of new states and by regulating the relations between the states among themselves and between them with the federal government.
In turn, Article 5 describes the procedure by which the Constitution may be changed through an amendment, stating that if 28 of the 50 states adopt a draft amendment, then this will become part of the Constitution.
Finally, Article 6 establishes that federal laws enacted under the Constitution, as well as ratified international treaties, are the supreme law of the United States of America, putting them above state laws.
