A growing rift inside the GOP is emerging as the Make America Healthy Again movement, led by Robert F. Kennedy Jr., clashes with Republicans backing pesticide manufacturers over liability, labeling, and federal preemption.

The fight, centered largely on glyphosate, is playing out across Congress, the courts, and state legislatures, with lawmakers weighing regulatory certainty for farmers and companies against health concerns, accountability, and voter backlash heading into the next farm bill debate.