General Discussion

Along the Western edge of the continent, water tends to flow east to west, not north to south. Our big and beautiful mountain ranges are in the way. They channel the water towards the sea. It would take enormous amounts of energy to pump the water from the Columbia River down to California. The amount of energy that would need to be expended would not be justified by the amount of water they could get.
And, those of us in the Pacific Northwest would fight this kind of robbery, tooth and nail. Thanks to climate change, we are not getting enough rain in the valleys and snow in the mountains to fulfill the needs of our region. Wild fires are becoming the new normal, which reduces the capacity of a watershed to hold water.
And, the local First Nations tribes have treaties which bind both state and federal governments to protect the salmon and other resources which are promised to the tribes at all of their historic and accustomed places. Those treaties are binding legal agreements, which have been in existence long before Pisswig and his grifting friends happened on the scene. There would be huge and expensive law suits. I would happily stand with the First Nations people on defending their treaty rights.
Rump is such an idiot! He thinks that because the standard globe depiction of our planet puts the North Pole at the top, that water must flow downhill, from north to south. Go learn something about plate tectonics, stupid orange moron.
My dad used to say that people from the East Coast do not grasp or understand the vastness of the West, nor do they appreciate the fact that a lot of land out here is vertical.