HANOI (AFP) – US President Donald Trump took his verbal jousting with Kim Jong-un to a new level yesterday, taunting the North Korean leader over his height and weight before musing over the idea of them eventually becoming friends. Yesterday Mr Trump got down to basics, with a sarcastic tweet prompted by recent descriptions of him in the North’s state media as a “lunatic old man”. “Why would Kim Jong-Un insult me by calling me ‘old,’ when I would NEVER call him ‘short and fat’?” the president tweeted from Hanoi. “Oh well, I try so hard to be his friend – and maybe someday that will happen!” he wrote. The dig about Mr Kim’s weight, which has increased significantly since he came to power after the death of his father Kim Jong-il in 2011, is unlikely to go down well in Pyongyang.