That's where you're wrong. Neither major party has any interest in this issue, since both of them are firmly in the back pockets of major international corporate interests.
Interestingly, "protectionism" is likely to become increasingly irrelevant as the value of the U.S. dollar slides and it becomes more and more attractive to manufacture products here in the U.S. over time. I read a fascinating article a couple of months ago about this subject, and the author made the case that by 2016 it will be more cost-effective to manufacture most consumer products sold in the U.S. in Alabama and South Carolina than in coastal China.