[Excerpt] These findings point to both an enormous challenge and a great opportunity for American unions. Clearly, under NAFTA and other free trade agreements more and more employers will feel emboldened to threaten to close the plant during organizing campaigns, and workers and unions will find organizing increasingly difficult. At the same time, unions have an opportunity to overcome these barriers to organizing if they commit enough resources to run large-scale, aggressive campaigns which mobilize the rank-and-file workers to build a union in their workplace, regardless of the intensity of the employer’s campaign.