Water is the big issue. For those who want a Border Wall to keep those dirty Mesicans out, I wonder how many would be trying to come if the US met it's treaty obligations for water in the Colorado and (probably) the Rio Grande. We dry up their country and wonder why they don't stay.

I understand, too, that CA is (or was) taking more than their legal share of Colorado River water. Because they could. Add in some tribes getting senior water rights to desert aquifers.

A really big pipe, plugged into Bonneville, would meet the needs for a while.