MEXICO

Trump threatens new tariffs over ‘water debt’ dispute

The Rio Grande Watershed Basin. Source: ArcGIS

After months of friction over trade, drug trafficking and migration, another, older source of tension is tightening the relationship between the United States and Mexico: water.

The dispute centers on a treaty signed in 1944, when the rivers that connect the two countries were far fuller than they are today. For decades, the agreement quietly governed the division of shared water, surviving droughts, population booms and political swings. Now, amid intensifying climate stress and a deterioration in bilateral relations since President Donald Trump’s return to power, it has become a flashpoint…

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