Proponents of GM food labeling avoid attacking GMOs themselves. In an effort to evade having to contend with the overwhelming weight of the science that declares GM foods to be safe, most labeling proponents claim they do not wish to judge their safety.Last May, Vermont became the first state in the U.S. to enact a law requiring that any retail food product produced from ingredients containing GMOs that is sold within the state must be labeled as such beginning 1 July 2016. A lawsuit has already been filed in federal court claiming that Vermont law interferes with interstate commerce and is therefore unconstitutional.A 2012 statewide ballot referendum in California that would have required labeling of GM foods was defeated, and a year later...