PRESIDENT BUSH'S VISION OF SOUND economic policy has remained remarkably constant over the last five years--tax cuts, free trade, and a generous amount of immigration. And why not? Low taxes, free trade, and new immigrants have benefited our economy over the past quarter century, and helped produce a remarkably successful economic performance after the shock of 9/11. Yet all does not seem to be well. Americans are unhappy about the president's management of the economy and pessimistic about the future. Maybe popular sentiment is simply shortsighted, or uninformed. But there is another, more rational reason for voter discontent: Times have...