Opinion: How serious is Trump about pulling out of NATO? Very

Opinion: How serious is Trump about pulling out of NATO? Very

Editor’s Note: Peter Bergen is CNN’s national security analyst, a vice president at New America, a professor of practice at Arizona State University, and the host of the Audible podcast “In the Room,” also on Apple and Spotify. He is the author of The Cost of Chaos: The Trump Administration and the World.” The views expressed in this commentary are his own. Read more opinion at CNN. President Donald Trump’s then-defense secretary, James Mattis, said in 2017 that NATO is …