The true gangster the world is facing in the Korean Peninsula is North Korea. The U.S. and South Korea should have a clear eye with whom they are dealing. The only language a gangster understands is a bigger fist than his. The Trump administration should take stock of the lessons learned from Singapore and adjust its strategies by immediately doing three things.

First, resume joint military exercise with South Korea. Second, continue to apply maximum economic sanctions and punish any country or entities who break the sanctions without consulting the U.S. first. Third, the U.S. should provide next steps and a time table for North Korea’s denuclearization, rather than letting Kim dictate them. Last but not least, let’s go back to referring to Kim as the “little rocket man.” Calling him “Chairman Kim” offers him too much legitimacy he doesn’t deserve.

Trump should be especially careful not to let the “little rocket man” school him at the art of the deal.