Comment: If you read further in the speech, Trump states:

"...denuclearization is its (i.e. NK's) only acceptable future..."

The next day Trump added "complete" to the phrase:

"...complete denuclearization is its only acceptable future..."

The fascist lunatic, Kim, who believes he is a living deity destined to unite the Korean Peninsula under his divine Orwellian, totalitarian rule will never give up his nuclear weapons.

Hence the dialectic is not dependent necessarily upon action.  Trump and his staff stated, as noted in my posts above, that NK will be attacked if it refuses to denuclearize, even if it does not attack anyone first.

The irony of the much stricter sanctions, (especially banking, textiles, and oil), is that the financial strangulation of NK will encourage Kim to attack first.

He will reason that if he & his regime are going to die, à la Saddam Hussein, then he might as well kill millions of his enemies;  he will.

Your assessment of the lying, progressive MSM is spot on.