From Ballotpedia - Reading time: 4 min

| Federalism |
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| •Key terms • Court cases •Major arguments • State responses to federal mandates • Federalism by the numbers • Index of articles about federalism |
Dual federalism (also known as layer-cake federalism) is a system of governance where the federal government and state governments each have clearly defined spheres of power. Under dual federalist political systems, the federal government cannot interfere with matters delegated to state authority, and states cannot interfere with matters of federal authority.[1]
Dual federalism contrasts with interlocking (cooperative) federalism, also known as marble-cake federalism. Interlocking federalism is a system of governance where federal and state governments share power and collaborate on certain issues.[2]
Under the doctrine of dual federalism, which lasted until around the New Deal era, the U.S. Supreme Court treated the federal and state governments as "separate sovereigns, each preeminent in its own fields but lacking authority in the other's."[3]
Political scientist Edward Corwin identified the following four characteristics of dual federalism:[4]
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