Forum Post: State to State contracts

I had this interesting idea. People are saying that free trade agreements take away jobs in the US. How about creating a system of trade agreements between states where one state would contract to create products with another. For example, California might pledge to make 1 million new computers produced exclusively by California workers and sell them to detroit for government use, in exchange for Detroit producting 20,000 cars for the california government, built in plants where US workers work. This would take the idea of barter to a new level. This idea could be extended to countries such as Spain, Greece etc. It would be part of a global new deal where citzens who produce there own goods exchange products and services with other citzens who produce their own goods within and between countries. (Also local barter exchanges or banks could be established to exhange goods and services locally)