When Barack Obama takes office on Tuesday, his first order of business will be a stimulus package estimated to be close to $1 trillion, including $300 million in tax cuts and the largest new government spending program for infrastructure since Franklin Delano Roosevelt. Sages nod that replicating aspects of FDR's New Deal will help pull the country out of a recession. But the experience under FDR largely provides a cautionary tale. Mr. Obama's policy plans are driven by the conventional economic wisdom that the New Deal economic programs ended the Great Depression. Not so. In fact, thanks to New Deal...