The US President tweeted in response to Mr Kim's declaration on New Year ’s Day that he has a button for nuclear weapons on his table and the entire US mainland is now within strike range.
Mr Trump said: “Will someone from his depleted and food starved regime please inform him that I too have a Nuclear Button, but it is a much bigger & more powerful one than his, and my Button works!”
The president does not actually have a nuclear button on his desk. Known as the nuclear "football", it is carried by a rotating group of military officers everywhere the president goes.
North Korean Leader Kim Jong Un just stated that the “Nuclear Button is on his desk at all times.” Will someone from his depleted and food starved regime please inform him that I too have a Nuclear Button, but it is a much bigger & more powerful one than his, and my Button works!— Donald J. Trump (@realDonaldTrump) January 3, 2018
The tweet was posted hours after America’s UN ambassador, Nikki Haley, dismissed the importance of proposed talks between Pyongyang and Seoul.
She said the US would not take any talks seriously if North Korea did not abandon its nuclear programme.
Following the president’s tweet, Democratic congressman Jim Himes of Connecticut told CNN: “It really doesn’t matter what the president of the United States says anymore because it’s so bizarre, strange, not true, infantile.”
Eliot Cohen, who was counsellor to Secretary of State Condoleezza Rice under President George W Bush, said Mr Trump's tweet was "spoken like a petulant 10-year-old".