This article takes up both the challenges and opportunities that labor migration poses for the organized labor movement. Labor has been dramatically restructured over the last quarter of a century, but there are now signs of labor recomposition as trade unions seek different paths toward revitalization. Increasingly, the movement of workers across national boundaries might create divisions, and it will be deployed to undermine existing labor standards. But we pose all the possibility that it might be a source of trade union revitalization, bringing in new members with new ideas but also creating a dynamic for raising labor standards rather than lowering them. In brief, internationalism begins at home.