Last May, Donald Trump stood in an arena full of farmers from California’s desiccated Central Valley and said words many yearned to hear: “If I win, believe me, we’re going to start opening up the water.” The audience, waving FARMERS FOR TRUMP signs, hollered their approval. “I just met with a lot of the farmers,” he said. “They have farms up here and they don’t get water. I said, ‘Oh, that’s too bad. Is it a drought?’ ‘No, we have plenty of water.’ I said, ‘What’s wrong?’ ‘Well, we shove it out to sea.’ And I said ‘Why?’”