ve said this before -- if you want labels to differentiate, then add a label to non-GMO food (and obviously, enforce truth-in-advertising laws on that). That's not something that a producer of GMO food can reasonably lobby to prevent.
"Reasonable" has nothing to do with it.
In Pennsylvania the big dairies tried to make it illegal to use a "no BGH" label on milk, regardless of whether such a label was accurate or not.
Similarly, the so-called "DARK act" (stupid name) would allow genetically engineered organisms to be marketed with "all natural" labels, in order to defeat negative labeling.
It seems to me that this whole thing smells like a clever attempt by certain corporate powers to undermine a hundred years of consumer information law. They probably don't really care about GMOs so much as they care about regulatory capture.
They want to go back to the caveat emptor era. This is just a skirmish in that ongoing war. They've already crushed the USDA, after all, now they are going after the FDA.