Kim Jong-Un has branded Donald Trump a "mentally deranged dotard" in a rare statement on Friday night in response to the President's threat to "totally destroy" North Korea.
He said he will consider the "highest level of hard-line countermeasure in history" against the United States.
Calling Trump's comments "the most ferocious declaration of a war in history," Kim said his UN speech on Tuesday confirmed Pyongyang's nuclear program has been "the correct path."