. . . NK has moved the US policy boundaries toward it to basically, bubbles around Japan, South Korea and the US.  The US will now "defend" up to the boundaries of the bubble.

Concommitantly, NK's permissable territory has expanded to basically, Japan and US territorial waters, and South Korea terra firma.  NK is now apparently permitted to "fly over" Japanese airspace with its missiles.

This is the current state of Trumpian international relations.  Within 8 months, NK has expanded it's operational theater to the line outside the territorial waters of US and its allies.

The US position is that it has retreated to "defend" anything past that into the territory of Japan or the US.  

Think about that.  

Trump is a disaster.