Former Texas Governor Rick Perry is Donald Trump's choice for Energy Secretary, according to several reports.
Perry, who made two failed runs at the presidency, is from a big oil state.
But the Department of Energy is about more than just oil – it's also in charge of the country's nuclear weapons program.
Jeremy Carl, research fellow at the Hoover Institution, explains how Perry's selection could affect California, which produces oil, alternative energy and plays an important role in nuclear research.