Building Large Salt-water Filled Irrigation Canals for Evaporation-Condensation Fresh Water On Mex Border is Better than a Fence

 Build large irrigation canals like the California Aqueduct along the Mexican border instead of useless expensive fences.  Fill one of two canals with Pacific Ocean water piped to the Continental Divide with solar power and fill one canal, with locks, and use solar energy to evaporate salt water and capture fresh water for farming.

Someone in DC must have a brain that works periodically, and when that happens border. Security canals for desalination should go ahead . There can be some fencing to protect the canal zone. Water could be sold to Mexico too since the desert there is fairly dry.