Timing of the announcement raised TV news eyebrows, coming as it does just weeks before the midterm election though Haley, widely regarded as a stabilizing influence on Trump, told reporters at a pop-up White House presser she will stay until the end of the year. He added that she will stay on through the end of the year.
Still, Trump lavished praise on Haley during the Oval Office event, saying she has "been very special to me" and calling her "somebody that gets it". 'We're all happy for you in one way, but we hate to lose [you]'. "I pick up the phone and call him or meet with him in person".
Before she was named to the United Nations post, Haley was governor of SC, the first woman to hold the post.
'For all of you that are going to ask about 2020, no, I am not running for 2020, ' she said. During Trump's presidential campaign, she sharply criticized his demeanor and warned what it might mean for USA diplomacy - even suggesting that his tendency to lash out at critics could cause a world war. "There certainly were great areas of contention between the United States and the U.N. But she played a very important and constructive role". "We will miss you... you've done a fantastic job", Trump said in warm words that clearly showed there was no animus between them.
The former SC governor has been a strong advocate of Trump's foreign policy.
Last month Haley wrote an op-ed in The Washington Post discussing her policy disagreements but also her pride in working for Trump. Trump teased an announcement less than an hour before his appearance with Haley, after news organizations began reporting she would resign.
Her departure is being seen as a blow for the White House just weeks before the U.S. midterm election.
She said that since the 2016 presidential election the United Nations had started to "respect" the USA again.
"In South Carolina, I was the first minority governor and - a real shock to the state - the first girl governor as well".
In December 2017, she said that women who had accused Mr Trump of sexual assault "should be heard".
She made clear there was no "personal reason" for her impending departure except she thinks government officials should know when it's time to "step aside" and allow someone else in with a fresh perspective. Haley's is the latest resignation in a leadership team with a relatively high turnover - Trump has already lost one secretary of state and two national security advisers. Her staff was reportedly only told of her plans to leave this morning.