"Oct. 20 (Bloomberg) -- Free-trade agreements with South Korea, Colombia and Panama may create or support more than the 70,000 jobs estimated by economists because service industries will add workers, U.S. Trade Representative Ron Kirk said."
http://www.businessweek.com/news/2011-10-20/free-trade-pact-u-s-job-gains-may-be-underestimated-kirk-says.htmlPlenty more if you want to google a bit. Of course, you could always just say that any source that talks about US jobs gains and free trade in the same sentence can't possibly be impartial, and decline to even consider the possibility.