“That’s very hopeful, since there is a long list of urgent problems that might benefit from more constructive diplomacy between Russia and the U.S.,” including Ukraine and arms control, says Russian political analyst Alexey Mukhin. The exchange offered a glimmer of hope for tundra-cold East-West relations – in particular the frigid links between Washington and Moscow – demonstrating that diplomacy between the two sides can still advance when both see it in their interest. From the Oval Office...