They 're rich , powerful and P.O. 'd . Democratic message to voters : Stop oil pipeline . Supporters say Keystone pipeline is good for the environment . Pipeline threatens groundwater , opponents say . Campaign : California has done more to transition to clean energy .
Democratic message to voters : Stop oil pipeline . Supporters say Keystone pipeline is good for the environment . Pipeline threatens groundwater , opponents say . Campaign : California has done more to transition to clean energy .