Layer Cake Federalism
Watch this two-part presentation on the key elements of federalism in the American political system. Layer cake federalism (also known as "dual federalism") describes a certain form of federalism, in which the national and state governments have distinct realms of authority that do not overlap and should not intrude. This form of federalism is in direct contrast to marble cake or cooperative federalism, which is based on a mixing of authority and programs among the national, state, and local governments.
Source: The Regents of the University of California, https://www.youtube.com/watch?v=5Bb7bLteJow
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