"The Democratic Party must lead on energy in order to not only win elections but to protect our land and water," she said. "There is no place in the party to keep on the outdated mantra of drilling more. We've done that for 100 years, it's time to diversify our energy base. Sen. Manchin can represent coal jobs and families. He just can't do that at the expense of others. That type of horse trading has to be over."