The Metropolitan Water District likely won’t pick up the slack to cover planning costs for the proposed Sacramento-San Joaquin Delta tunnel That’s a huge shift from MWD’s “all in” support of the previous tunnel project. And MWD’s pull back could create a ripple of iffyness among other State Water Contractors about how much of their own money they want to invest down the line without the giant southern California water purveyor in its usual position as a financial backstop.