“The prospect of regime change is a serious concern. The Kremlin understands that (U.S. President Donald) Trump is unpredictable. They felt more secure with Barack Obama that he would not take any action that would explode the situation, but with Trump they don’t know.” Kortunov, the think-tank chief close to the Russian Foreign Ministry, said he did not think the Kremlin’s defense of Kim Jong Un was based on any personal affection or support for North Korea’s leadership, likening Moscow’s pragmatic backing to that it has given Syria’s President Bashar al-Assad. Moscow’s position was motivated by a belief the status...