Texas conservative Sen. Ted Cruz said his home state should consider reforms to its famously free market electricity system after the power grid failed to withstand extreme winter weather. It caused nearly half of its power plant capacity to fall offline and left more than 4 million in the dark for days.

“Texans are frustrated and angry that the energy capital of the world couldn’t keep our lights on and heat in our homes,” Cruz told the Washington Examiner in a recent interview. “It’s embarrassing and infuriating. We need to make sure that it never happens again.”