US wins its GMO corn case against Mexico, but in front of the wrong court

Last Friday, a dispute settlement panel convened under the U.S.-Mexico-Canada Agreement ruled in favor of the U.S. on two Mexican measures blocking imports of genetically modified corn.

The U.S. won all its legal claims. Mexico sought to get the panel to forgive any transgressions by invoking three exceptions, but none of them worked. As U.S. Trade Representative Katherine Tai explained, the ruling “affirms that Mexico’s approach to biotechnology was not based on scientific principles or international standards.”

It was...