Dual federalism prevailed in American politics until which reform period?

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Dual federalism, characterized by a clear division of governing authority between the national and state governments, was predominant in the United States until the New Deal era. The New Deal, introduced by President Franklin D. Roosevelt in response to the Great Depression, significantly expanded the role of the federal government in the economy and welfare, marking a shift towards cooperative federalism.

Dual Federalism Prevailed in American Politics Until Which Reform Period