NAFTA

Trade deals like NAFTA can have vast long-term impacts on diet and health. Experts say they're concerned that the U.S. isn't addressing these implications of the Trans-Pacific Partnership.

Unions blame job losses on trade deals like NAFTA signed under Bill Clinton. But President Obama argues one he's trying to strike with Pacific Rim countries is different, and it's dividing his party.

The trade agreement has helped the U.S., Mexico and Canada sell a lot more food to one another. That's meant more seasonal produce for the U.S., and more processed food and supermarkets for Mexico.