Nicole, there are some companies that use shops that are in US Commonwealths, like the Northern Marianis Islands, that do not have the same labor protection laws as the US states do, but clothing made in those shops can still have a "Made in the USA" label on them. The case I found was from 1999 where several well known companies (BR/Gap/ON, Nordstrom, Target/Filenes/Marshall Field's, and yes, even J. Crew to name a few) used sweatshops that were housed there. Nordie's and J. Crew settled out of court and agreed to independent oversight of all their manufacturing facilities--I didn't follow up on what BR, etc. did. So, even if it has a "Made in the USA" label on it, you can't be sure unless you actually look up where the manufacturing facility is physically located and then what conditions are like at that facility. I have to say that child labor was not part of this dispute, only poor wages and working conditions.
I agree with Angie, I'm not sure if there is a way to be completely responsible when shopping, you just have to do the best you can. Even with "organic" products every country (and even states within the US) have different standards and protocols that need to be met in order for something to be labeled "organic," and some of the standards are so low, they really do next to nothing to help the environment.
http://www.consumerreports.org.....ndards803/