The longest-serving president in U.S. history, and leader through the Great Depression and World War II -- two of the nation's worst crises -- Franklin Delano Roosevelt is considered by many to be our greatest president. FDR, for better or worse, forever changed the American people's relationship with their government. The governmental "safety net" he created, called the New Deal, would be his greatest legacy -- and the source of ongoing controversy today. Learn about the New Deal and his other presidential activities with this teacher's guide from American Experience: "FDR." This resource is part of the American Experience Collection.