US President Trump abruptly canceled the summit with North Korean leader Kim Jong-un on Thursday of last week. Yet one day later, he seemed to backtrack on that decision and said that the meeting could be resurrected after the US negotiators had had “very productive talks with Pyongyang.” So what has led to this renewed volatility in US relations with North Korea after the recent period of detente? The answer lies in US Vice President Mike Pence’s reference to a “Libyan solution.”