Water Accounting

 

Canada will not sell water to the USA. It prefers to let it flow into the Pacific. Mexico is receiving its quota in Baja California and is misusing it to flood and wash salty soils. 

A commenter explains: The 1944 treaty requires the US to allow 1.5 million acre-ft of water to flow into Mexico from the Colorado river and requires Mexico to allow 350,000 acre-ft from the Rio Grande into Texas.

Mexico hasn't lived up to their responsibility while the US has been. Mexico often requests more water and it had been granted every time despite them not living up to their mandated amount.

I think that President Trump is touching on a very sensitive issue and creating border conflicts. Water may not be worth it.