He faced opposition from the Supreme Court as they ruled some aspects were unconstitutional, thus preventing legislation and progress. He also faced problems from people who believed the New Deal did not go far enough, for example Senator Huey Long, who believed more should be done for the disadvantaged groups in the society under the New Deal.
American leaders chose to create a new plan of government because they were afraid that, with the plan of government they had already, the new nation would fall apart.