President Trump’s ambassador to the United Nations, Nikki R. Haley, has resigned, ahead of what Mr. Trump promised on Twitter on Tuesday was a “big announcement” with Ms. Haley at the White House, according to the New York Times.

Haley’s Surprise Resignation is Subject of Debate And Speculation  

The news reportedly blindsided those in the foreign policy establishment, the White House and even members of Haley’s staff, the Washington Post wrote.

Another source familiar with the matter said Haley’s resignation caught national security adviser John Bolton and Secretary of State Mike Pompeo by surprise.), according to CNN. 

Nikki Haley’s resignation comes one day after an ethics watchdog requested an investigation into her acceptance of free flights on private jets, Business Insider.

“The three businessmen who provided the flights to Haley and her husband were Jimmy Gibbs, Smyth McKissick, and Mikee Johnson. Gibbs is the CEO of Gibbs International, and McKissick and Johnson are CEOs of private companies in South Carolina,” according to Business Insider. “By accepting gifts of luxury private flights, Ambassador Haley seems to be falling in line with other Trump administration officials who are reaping personal benefits from their public positions,” CREW’s executive director, Noah Bookbinder, said in a Monday statement, Business Insider.