Just about every economist in modern times, and every president, including New Democrat Bill Clinton, has recognized the net benefits of free trade and open markets - including labor markets. History has proved that the United States creates better jobs and more of them - supported by those jobs that move overseas.
Countries with larger pools of labor have a comparative advantage in labor-intensive goods. They are wise to specialize accordingly. Countries with natural resources (oil, agriculture, minerals, etc.) will do the same. Trade facilitates the process of specialization and raises living standards in participating countries. Countries that refuse to open their borders are tragically left behind. The longer we distort markets through protectionism, the longer the world uses its precious resources less efficiently and diverts more efficient economic patterns, to the detriment of everyone, including the United States.
While the process of replacing old jobs with new ones is painful for those who benefit from the old order of things - in this case, families and workers - any form of progress has this same characteristic. The longer we subsidize and consequently postpone the laws of supply and demand, the more difficult that inevitable transition becomes.
Moreover, free trade and open markets are part of any successful foreign policy. If you want to make certain that the disaffected poor in the least-developed nations are not drawn into terrorist training camps against the United States, the greatest policy is to help them through trade-related jobs.
America is always about the future. That future, by definition, cannot be about the jobs of the past - those that are headed overseas - but the jobs of the future, those we cannot even see. What will matter in the end is our focus on the productivity and quality of our own labor force, not the relative cheapness of another's. The beauty of a free market is that consumers have proved to be excellent at sorting out the best combination of each.