N. Korea: Expert says Trump making issue 'personal' against Kim Amid rising tensions with North Korea, the US has issued fresh economic sanctions seeking to isolate what President Trump referred to as "the North Korean menace". Foreign policy expert Robert Einhorn, a former advisor on arms control and non-proliferation to the Clinton administration, says the president's fiery tweets and aggressive statements tend "to personalize the issue" and "have the opposite effect" of deterrence. IMAGES AND SOUNDBITES