It is not a Mystery as rural America has indeed been neglected under previous administrations. Krugman tries but misses catching the point. How the rural economy has changed in the last two decades and how it has been neglected is evident from many sources and reports which offers a window into the efforts to better understand and tackle the problems of rural America. A major problem is technological change which has reduced economic opportunities in rural areas. Another problem is that the earlier governments have not planned to invest in rural areas in a way that would restore dignity and work to communities, and better prepare for changes by taking actions that make the rural areas more resilient and create new opportunities to replace the old. Too much attention has gone to technological changes and companies in urban areas and too little to the real needs of rural America and revitalizing the regions as part of overall development. Compare this with Kennedy's exhortation in the South, in places like Arkansas in 1961-1963 with investment in that largely rural state saying that an investment there was as important for New York or California as it was part of investing in America- this is where he said "a rising tide lifts all boats" for the first time. ...