Sunday, former Obama Secretary of Education Arne Duncan elaborated on his call for students to boycott school until gun laws change.

Duncan initially proposed it in a tweet on Friday afternoon.

“I think we have to create a tension that hasn’t existed yet,” Duncan explained. “And I think only that kind of created tension can push people to confront an issue that they’ve been able to run away from, to hide from.”

“It’s time to think much more radically,” Duncan added.

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