References:
1.http://en.wikipedia.org/wiki/Trade_deficit
2. http://www.opednews.com/articles/Biggest-Threat-to-America-by-alec-feinberg-100609-154.html, Biggest Threat to America's Future --" The U.S. Free Trade Deficit - Key Facts
3. http://en.wikipedia.org/wiki/Tariff
4. www.ctj.org/hid_ent/part-2/part2-3.htm, "Tax breaks for multinational corporations"
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