James B. Steinberg
The president is surrounded by serious advisers who have either served or serve in the military, and are aware of the risks of military action [against North Korea]. I think Trump, whatever his public posture, is getting a sober education on some of the realities.
Deterrence [against North Korea] has worked remarkably well for more than 60 years as both sides understand the consequences of taking military action. The question is whether those ground rules are changing now. I don't believe they are. Still, miscalculation is a concern and too much rhetoric and idle chatter from both sides about preemptive strikes could lead one side to seriously consider taking action. There are extraordinary inhibitions in the use of force, but that's not a guarantee.
[The exchange of threats and military posturing between the United States and North Korea] raises the stakes. With the United States and others talking far too loosely about the prospects of a pre-emptive strike, that’s what would trigger retaliatory actions by North Korea.