I am not surprised large corporations are lobbying to enforce strict copyright laws onto even more countries. The problem with trade with Mexico, though, is not the copyright laws, but the cheap labor. When Mexico's minimum wage is $0.48, there's no way American labor can compete. And once the jobs are shipped there, Mexico has no incentive to raise wages for Mexicans. In fact, they have an incentive to keep the people poor so they can keep getting foreign jobs.
What we need to do is to extend our labor and environmental protection laws to the countries we trade with. If we don't do that, then our labor will continue to be uncompetitive, people will be unable to unionize, middle class jobs will continue to disappear, and the capital owners will continue to be the only ones to benefit from globalization.