Gov. Gavin Newsom, like governors before him, wants to overhaul how water moves through the delta. He’s proposing a 30-mile tunnel that would streamline the delivery of water from the Sacramento River, a bid to halt the ongoing devastation of the delta’s wetlands and wildlife while ensuring its flows continue to provide for the rest of the state. The pressures of climate change on water supplies have only increased the urgency to act. And the coronavirus pandemic and months of shelter-in-place orders haven’t slowed the planning. ….The tunnel, as much as anything, is the very symbol of the state’s never-ending water wars.