Possibly correct that KJU is not rational, but this is not rationale for delaying peace talks.

The rational course for the U.S. President is to have peace talks and in them give the DPRK 3 months to turn in their nuclear weapons to China. Failing that, their nuclear weapons should be removed by whatever means necessary.

Being unclear about red lines encourages rational risk takers running the DPRK to build nuclear weapons. This is Clinton, Bush, and Obama’s failing. Trump can do better. (If he stops wasting time with his absurd Twitter war.)