The one thing that Trump has done that has received bipartisan support and a positive media response (both were misguided) was the pinprick missile attack on Syria. It was an effort to prove that he was tough and unpredictable without any meaningful practical consequences.
Given his love of popularity and lack of imagination, can you imagine him launching a similar pinprick attack on North Korea in the hope of putting an end to Kim’s missile and nuclear programs without a full scale war? I certainly can. The difference, of course, is that Kim could either see through the bluff or respond by starting the ghastly war that Trump would presumably prefer to avoid, if possible.