What would a Trump 2.0 ‘energy emergency’ look like? History offers clues.

“The big question is, are you going to use this tool surgically or try to pursue it more broadly?” said Devin Hartman, director of energy and environmental policy at the libertarian R Street Institute.

“The more this strays from the underlying identification of reliability needs, the more suspect it will be legally,” he said, “and the worst type of policy it will be. So you really have to contain and use these things sparingly.”