Politically Trump is in a good spot vis-a-vis NoKo. Democrats are inclined to support this sort of diplomacy (see: Iran) and Republicans will mute what would otherwise be harsh criticism (see: Iran) because this is a GOP admin....
...What about tariffs? Why weren’t Republicans muted on that issue? Directly threatens their re-election by undermining economic benefits of tax bill (their view.) Trump’s NoKo gambit could be well received by voters generally in short/medium term, possibly helping 2018 Rs. -fin