The U.S. government needs to clearly enunciate a policy that protects more critical systems from hackers, even in the private sector, a prominent policy expert told CNBC's "Squawk Alley" on Friday.
"What the government has tried to do is to take critical infrastructure .... like the electricity grid, and say, 'If you attack that, it could be an act of war. Well, are airlines critical infrastructure? Yes. Is our election system a critical infrastructure? In my mind, yes," said Walter Isaacson, president of the Aspen Institute, a nonprofit that helps leaders solve complex problems. Isaacson is also the author of "The Innovators: How a Group of Hackers, Geniuses, and Geeks Created the Digital Revolution."