Nukes or not, North Korea is ZERO threat.   China and Russia keep NK on a leash.  Trump needs to just back away, and all will be fine.  If you notice, none of this mess started until Trump irresponsibly felt the need to insert himself in the mix, in order to try and look like a real President.  He failed.  He's trying to make something out of nothing.  NK likes firing a missile on occasion, to show its countryfolk it is a powerful country.
If Trump keeps up his ridiculous harassment of NK, China and Russia are just as likely to put a muzzle on the manchild Trump.
Just leave North Korea alone, as all intelligent Presidents have done.