Cattle imported from Mexico have become a significant part of the U.S. beef supply, raising the stakes for the Trump administration’s battle against an outbreak of New World screwworm at a time when U.S. cattle production is in a down cycle. Consumers are feeling the pinch of higher beef prices due to the reduction in cattle supplies, while ranches and feedlots in the southwestern United States that rely on Mexican cattle for their normal operations also are being hurt.
