Nikki Haley resigns as US ambassador to UN

The United States' ambassador to the United Nations, Nikki Haley, has unexpectedly resigned. She made the announcement with President Donald Trump by her side earlier this morning, rejecting the suggestion that she was preparing to challenge Mr Trump in the 2020 election. Ms Haley has been the face of Trump's "America First" policy at the United Nations, leading the country's withdrawal from several UN programmes and defending Mr Trump's hard-line policies against Iran and North Korea.