In order to resolve the Great Depression, President Franklin D. Roosevelt adopted the New Deal, which aimed at a powerful and centralized government, and would profoundly intervene in people's economic activities and limit their economic freedoms. However, the New Deal was fiercely opposed by many Americans, particularly the conservative justices at the Supreme Court. The Court repeatedly used the power of judicial review to strike down many programs of the New Deal. These acts provoked President Roosevelt and aroused a serious conflict between the judicial and political branches. Although the Court changed its attitude to the New Deal later, it caused a constitutional controversy. This paper focuses on the constitutional debates on the New Deal and examines the judicial influence on governmental policies.