‘Nasty’: Trump says Kim Jong Un used to call Biden a ‘mentally retarded person’

US President Donald Trump claims he “gets along” with North Korean leader Kim Jong Un. “Kim Jong Un ... I get along with very well, as you know. Did you notice he said very nice things about me,” he said. “He used to call Joe Biden a ‘mentally retarded person’ ... he was so nasty to Joe Biden, it was terrible, but to me, he likes Trump.”