… Trump has found a perhaps obvious avenue to pursue his goal to ensure the United States is getting a fair shake on the world stage. But some experts fear bringing tariff threats and “America First” rhetoric into the world of water negotiations will backfire, and that the careful work of administering the 1944 water treaty could get damaged in the process. … The treaty is a complex document, but it requires the United States to deliver water from the Colorado River to Mexico, and Mexico to deliver water from the Rio Grande to the United States. … After Trump threatened tariffs in April, Mexico’s president did announce an additional water shipment to Texas from Mexico’s reservoirs on the Rio Grande. But experts say there just isn’t enough water available for Mexico to get back on track by October. … Many of northern Mexico’s reservoirs are low or empty, and in some places, a lack of rain means rivers run dry.

Other water treaty news:

• The Packer: While Mexico promised more water under the 1944 treaty, U.S. growers say they need more water certainty, for Chihuahua to play by the rules, and treaty enforcement