“I’m not sure I’m that optimistic, it’s just the alternative is so catastrophic”: U.S Senate Democrat Chris Coons

After President Trump’s threats against Greenland and other NATO members, many have questioned what Trump believes he might gain from going against some of his closest allies. While the future remains uncertain, for now EU members such as France and Denmark have decided not to respond aggressively. To discuss how this might develop, U.S. Democratic Senator Chris Coons joins CNN.