Former Republican Texas Gov. Rick Perry, President-elect Trump’s pick to lead the Energy Department, was being pulled by Democrats and Republicans during his confirmation hearing Thursday to be an advocate for both fossil fuel development and maintaining the agency’s forward movement on climate science and renewable energy.

Sen. Lisa Murkowski, R-Alaska, chairwoman of the Senate Energy and Natural Resources Committee, said if Perry is confirmed, he must “step up to become an advocate for energy supply,” which includes helping her state, a top oil producer, to move forward on developing new sources of fossil fuels.