Nikki Haley: Trump aimed to 'keep Kim on his toes' with 'nuclear button' tweet

US ambassador to UN defends president’s rhetoric on North KoreaHaley: ‘It’s not us that’s going to be destroyed, it’s you’Bandy Lee: Trump’s mental health is a matter of public interestDonald Trump’s tweet taunting North Korean leader Kim Jong-un over the size of his “nuclear button” was meant to “keep Kim on his toes”, the US ambassador to the United Nations said on Sunday. Related: Booked! Trump, staffers who cried Wolff a