Answer:
the federal principle or system of government
As made explicit in the Ninth and Tenth Amendments to the U.S. Constitution, American federalism preserves this diversity by establishing a presumption of power against federal authority. Any proposed federal action must be justified by a constitutionally enumerated power—that is, one specifically granted to the federal government -- or derived from some other piece of constitutional text.So,it affect the citizen of arizona.
Examples of the federation or federal state include the United States, India, Brazil, Malaysia, Mexico, Russia, Germany, Canada, Switzerland, Bosnia & Herzegovina, Belgium, Argentina, Nigeria, Pakistan, and Australia.
