Unable to make de-escalation progress using conventional diplomatic means at the United Nations, on Monday South Korean President Moon Jae-in proposed that the U.N. Security Council hold serious discussions about imposing an energy and capital blockade on North Korea, by cutting off oil supplies to Kim’s regime coupled with a block of North Korean sources of foreign currency, the South Korean president’s office said. Moon discussed the idea with his Russian counterpart, Vladimir Putin, during a phone call, according to South Korea’s Blue House.