I would be a little reluctant to uptalk America's role in this situation, Trump in particular. Much of this has happened independent of the United States, and because of China's influence in the region. If anything, his efforts have further alienated our allies and driven them more into the arms of their neighbors and other trade partners and away from American influence (Mexico and Canada bypassing the United States to make deals in Europe and Asia is a fine example). It definitely appears that they are intent on replacing the United States with other customers who are willing to play a little nicer (maybe China has convinced NK that they can benefit from this situation). Although, Trump's unpredictable behavior may have given North Korea pause and a reason to play a little nicer. It still seems more likely that this is political and economic maneuvering and they will either use America's unwillingness to cooperate as a wedge to drive between allies, or they will play up to Trump's ego and tensions will ease (giving Trump an opportunity to claim a win, even if little of it can be attributed to him personally).