The problem with this is that Trump is configuring this as a cuban missile crisis "he who blinks wins" paradigm.
He's making an existential threat, which the experts seem to think CONFIRMS THE ULTIMATE THREAT KIM JONG UN and his cohorts ACTUALLY fear.
Think about this.  If the assumption by the NK regime is that it's biggest threat is that it ceases to exist once the US advances militarily (by all accounts, this is the concern that drives NK policy and behavior), then by doing so, or threatening to do so, Trump telegraphs on message:  "Under me, the US WILL take military action against you, and the US WILL obliterate you."  The additional message fragment is that the US will do so unless NK stops developing Nukes and disarms of them. 
NK, alternatively, apparently believes that once it does not have nukes, the US will take military action against it, and the US WILL obliterate it - without NK having a nuclear deterrance capability.
So, isn't Trump saying, "You're dead either way"???