US Ambassador to the United Nations Nikki Haley has resigned her post and will leave the Trump administration by the end of the year.
Read the text of Haley's resignation letter addressed to President Donald Trump:
October 3, 2018
Dear Mr. President:
It has been an immense honor to serve our country in your Administration. I cannot thank you enough for giving me this opportunity.
You will recall that when you offered me the position of United States Ambassador to the United Nations in November...