Trump is a bit lost when trying to strong arm someone if there aren’t tile installation, drywall hanging and painting bills to withhold payment on unless he gets his way.
China and Russia want to give concessions to NK in order to curb their nuclear program. Those concessions mean the US pulls back in SK and no doubt give mounds of food to NK. This would make Trump look week and his base would suffer daily ridicule from non-Trump supporters. The only way Trump can come out of this somewhat clean is to surgically strike at NK scientists and nuclear experts. This could slow down the program, but would probably motivate NK to start launching more ICBMs, etc.