Washington believes the regime is irrational and can’ t be negotiated with. But look at the situation from North Korea’s perspective.
In Washington, there is a conventional wisdom on North Korea that spans both parties and much of elite opinion. It goes roughly like this: North Korea is the world’s most bizarre country, run by a crackpot dictator with a strange haircut. He is unpredictable and irrational and cannot be negotiated with. Eventually this weird and cruel regime will collapse. Meanwhile, the only solution is more and more pressure.