In Partial Victory Against GMOs, US Congress Bans FDA From Approving GM Salmon

Apparently, the only way for Congress, absent new legislation, to prevent an action by the FDA is to withhold funding from the agency. The House took this step, a first in US history, to protect wild salmon and human populations from contamination by a bioengineered salmon that contains pesticide and growth hormone genes that make it grow twice as fast as natural salmon. 
http://www.NaturalNews.com/032719_GM_salmon_Congress.html

House Votes to Block FDA Approval of Genetically Modified Salmon
http://www.huffingtonpost.com/2011/06/16/genetically-modified-salmon-fda-approval_n_877983.html