The argument over genetically modified food has been dominated, in recent years, by a debate over food labels — specifically, whether those labels should reveal the presence of GMOs.
The battle, until now, has gone state-by-state. California refused to pass a labeling initiative, but Maine, Connecticut, and Vermont have now passed laws in favor of GMO-labeling.
Opponents of GMO labeling, including some of the biggest food manufacturers, have turned to Congress, and this week they achieved their first notable success.
A solid majority of the House of Representatives on Thursday voted in favor of a law that would block states from mandating GMO labels.
The debate in Congress followed familiar lines. Opponents of the bill, such as Chellie Pingree, a House Democrat from Maine who is also an organic farmer, argued that it's important for consumers to know what they are eating.