With Donald Trump set to be the Republican presidential nominee after a string of primary wins on March 5, South Korea and other U.S. allies will be increasingly focused on the implications of a potential second Trump presidency for global stability and economic prosperity. A commonly expressed concern is that a restored Trump presidency would be unpredictable. In reality, Trump's policies are relatively clear. The distinctions in Trump's foreign and economic policies are in their divergence from traditional U.S. policy, not in their inherent unpredictability.