There is little free trade in the world. Every nation favors either some or all of its domestic industries. If we treated our defense treaties the way we treat economic treaties, we would be a third-rate military power.
Clarification- I am NOT for more restrictive trade agrrements now, either in the Buchanan or Obama mode. Some point after we recover in a few years, we need to address some issues- unions, Federal Reserve policy, taxation, govt mandates etc. We need to make the US more welcoming to business.