John Kerry: Trump’s Paris Pullout Threatens Global Response to 'Existential Climate Crisis'

John Kerry: "If [Donald Trump] pulls out of the Paris Agreement, he would diminish the ability of the world to be able to respond to this existential [climate] crisis."

"This is a really serious issue, and I'm trying to figure out why human beings are so wired that they don't want to take an existential challenge at face value."