Found this info from EPI and Public Citizen:
http://www.epi.org/economic_snapshots/entry/free_trade_agreement_with_korea_will_cost_u.s._jobs/http://citizen.typepad.com/eyesontrade/Free Trade Agreement with Korea will cost U.S. jobs
EPI’s research shows it will increase the U.S. trade deficit with Korea by about $16.7 billion, and displace about 159,000 American jobs. The USITC has a history of vastly underestimating the negative impacts that free trade agreements have on the U.S. economy. In 1999, it estimated that China’s entry into the World Trade Organization would increase the U.S. trade deficit with China by only $1.0 billion, and have no significant impact on U.S. employment. In fact, the U.S. trade deficit with China increased by $185 billion between 2001 (when China entered the WTO) and 2008, and 2.4 million U.S. jobs have been displaced or lost. The U.S. trade deficit with Mexico also rose rapidly after the North American Free Trade Agreement (NAFTA) took effect in 1994.
With U.S. unemployment close to 10%, and an employment gap of nearly 11 million jobs, it would be foolish and self destructive for the United States to implement a free trade agreement with Korea that leads to further job loss.