What is the link between the growth of the national government and changes in federalism as practiced in the US?

The growth of the national government in the U.S. has led to a shift from dual federalism, where state and federal powers were clearly delineated, to cooperative federalism, characterized by more intertwined responsibilities and collaborative governance. This expansion, particularly during the New Deal and subsequent social programs, increased federal authority in areas traditionally managed by states, such as education and healthcare. As a result, federal funding and regulations have become pivotal in shaping state policies, reflecting a more centralized approach to governance. This evolution highlights the dynamic nature of federalism as it adapts to changing societal needs and priorities.