I dont know, what would you like the US to do if they step out of line?
I can put my hatred of Trump aside, how about you try it and look at it from a non-partisan view:
Then:
Prior to Trump we have little talks with NK and you could set a watch based on their Nuclear threats.
Now:
We have some talks with them, we have deescalated tensions and they havent threatened a nuclear strike.
Which option Then or Now will lead to a substantive talks that could lead to lasting peace?