Nauert, a former Fox News host, has seen a meteoric rise in the Trump administration, but that apparently does not equal Cabinet rank.
When Trump fired media-shy Texas oilman Rex Tillerson as his secretary of state in March via tweet - their relationship by then bordered on poisonous - Nauert saw her influence grow under successor Mike Pompeo, whose combative style is more in tune with the president.
After Tillerson's departure, Nauert was catapulted into the position of acting undersecretary of state for public diplomacy and public affairs. Trump doesn't want an United Nations ambassador to advise him - he wants a salesperson in NY.
Haley told The Weekly Standard she would remain in NY for the next two years so her son could finish high school there, and she wanted to remain an active voice on foreign policy. "You know what I think about?"
Nauert had worked for Fox News from 1998 to 2005 before joining ABC.
State Department spokeswoman Heather Nauert.
James Comey appears before House Judiciary Committee in closed session
Under a deal struck with the House Judiciary Committee, he can speak afterward and a transcript will be released. Comey said he might answer questions after the interview, which is expected to last much of the day.
Relatively new in the political scene, analysts have now pointed at her lack of political and policy credentials which Haley, a former SC governor, possesses.
She will face a variety of challenges if confirmed for the job, including championing U.S. efforts to contain Iran's influence in the Middle East and ensuring the global body maintains tough sanctions on North Korea as Washington tries to negotiate an end to Pyongyang's nuclear and missile programs.
"But I don't agree with the president on everything".
It was not immediately clear if Nauert would be able to defend Israel in the same powerful way as Haley did.
Trump has been critical of the United Nations, complaining about its cost to Washington and criticizing it for focusing on bureaucracy and process rather than results.
But the former television anchor has mostly avoided snafus, keeping regular press briefings concise and winning praise for her poise as she fields a dizzying array of foreign policy questions.
By not selecting a veteran foreign policy or national security hand who might push back on his decisions or try to push him toward another option, Trump is making clear he is the diplomat-in-chief. The president both denies watching hours of Fox and other networks each day and says publicly that he "watches all the shows". "Ambassador Haley was a far more high-level figure, particularly early in the administration".