Quackery Has its Limits  The USMCA panel opining on the Mexican ban on GMO corn has decided it will not accept comments from Canadian NGO groups wanting to support the Mexican position. First, the Canadian’s position in the case is largely amicus curae. Canada is a minor producer of corn and exports around 3 percent of the volume of the U.S. Second, jurists are already more than aware of the message from anti-GMO activist groups, be they from Canada or anywhere else. It is hyperbole that only receives time out of the courtesy of political comity. The EU’s EFSA allotted standing to anti-glyphosate activists and the thousands of pages of quackery they submitted failed to dissuade regulators of the scientific efficacy of the...