There were many beginning with the GATT agreement in 1946. The latest was the Uruguay agreement in 1986. These agreements are not with the WTO though. They are multilateral treaties with many other countries. We adopted them and we are obliged to honor them.
Those who value Free Trade over national soverignty are committing treason.
Well fortunately the constitution defines treason differently.
If history is any guide then it is not free trade that poses the biggest threat to national survival but opposition to free trade. Just look at history's most strident examples of economic self-reliance: Nazi Germany and the USSR. Both of them were economic basket cases compared to the countries that practiced free trade.
listen to this this good
http://www.youtube.com/watch?v=HodqhJS8jxE
is this happen now in America?
http://www.youtube.com/watch?v=mDulUKcmYvI
wto treaty did not get 60 vote