Seems Trump's response to North Korea may have been spontaneous.
www.theguardian.com/world/2017/aug/09/north-korea-us-rex-tillerson-nuclear-war-threat
It became clear on Wednesday that Trump had issued his “fire and fury” threat without consulting his national security team on his use of language. He had piece of paper in front of him when he spoke at his golf resort in New Jersey, but the New York Times reported the paper was about the US crisis in opioid use.
The White House press secretary, Sarah Huckabee Sanders, said the new chief of staff, John Kelly and other national security staff were aware beforehand what “tone” the president would adopt but added: “The words were his own.”
Trump had a telephone consultation with his advisers earlier on Tuesday in which the North Korea crisis was discussed but Trump is said to have given no warning of the language he would use, in which he resorted to one of his favourite turns of phrase, “like the world has never seen”, which he has used frequently to underline the significance of his actions.