NationofChange 80 groups blast US interference in Mexicoâs phaseout of glyphosate and GM corn âWe call on Secretary Vilsack and Trade Representative Tai, as key leaders in the new administration, to respect Mexico's decision to protect both public health and the integrity of Mexican farming.â A coalition of 80 U.S. agricultural, consumer, environmental, public health, and worker groups sent a letter Thursday to key figures in the Biden administration calling for them to “respect Mexico’s sovereignty and refrain from interfering with its right to enact health-protective policies”âspecifically, the phaseout of the herbicide glyphosate and the cultivation of genetically modified corn.