Kim Jong Un just changed Donald Trump's presidency. The North Korean dictator's first successful intercontinental ballistic missile test on Monday did more than shake up strategic calculations in the Pacific. It presented Trump with his first real test on the global stage as he flies off to meet far more experienced leaders at the G20 summit in Germany, some of whom are ill-disposed to help him and don't have the US's best interests at heart. It's a trip that will now be judged on Trump's capacity to secure not just international condemnation of North Korea's actions, but to advance US efforts to change the strategic calculation in Pyongyang.
