In a closed-door negotiation last week over the fate of the Colorado River, representatives from California’s powerful water districts proposed modeling what the basin’s future would look like if some of the West’s biggest cities – including Phoenix and Las Vegas – were cut off from the river’s water supply, three people familiar with the talks told CNN. California was proposing following the “law of the river,” which gives farmers in major agricultural districts first dibs on water because they have a priority claim established before other districts’ rights – including Californian cities like Los Angeles, which receives around half of its water from the Colorado River. Buschatzke, Arizona’s top water official, called the six-state proposal a “very positive outcome” and said he and others would try to keep conversations going with California