Best president on economic policy and why?

Ronald Reagan. The economic turmoil and terrible inflation left to him by the Carter Administration was a mountain that seemed impossible to climb. Reagan quickly moved in a direction of lower taxes for all tax brackets and decreased the size and control of government. Supply-side (Voo-Doo, Trickle down) economics, later known as "Reaganomics", gave America the longest period of economic prosperity in a non-post war economy. In transverse, the worst economic policy for a president belongs to Franklin Delano Roosevelt, whose New Deal more than doubled the Great Depression in duration and magnitude.