Trump announced the nomination in brief remarks to reporters.
On the other hand, while mostly toeing the administration's line at the state department lectern, she has spoken out strongly in support of journalism, at a time the president has referred to the press as the "enemy of the people", and called for accountability for the massacre of Rohingya civilians by Burmese forces while the administration dithered over whether to call the mass killings a genocide.
Ms Nauert worked for Fox News from 1998 to 2005 and, after two years away during which she worked for ABC, she returned to Fox in 2007, later becoming a presenter for Fox & Friends.
Nauert was criticised last month, when she posted a tourist-style Instagram photo from outside a royal court in Riyadh; she was in Saudi Arabia on an official visit with Pompeo to discuss the fallout from the murder of journalist Jamal Khashoggi. "Heather plays a key role in advancing US foreign policy & I look forward to her speedy confirmation". In turn, these played a role in weakening North Korea's weapons program, and persuading Kim Jong Un to take part in negotiations, she said.
The contrast between Haley and Nauert's respective credentials and diplomatic experience couldn't be more stark.
A White House official says the Trump administration is downgrading the US diplomatic post at the United Nations to a non-Cabinet position.
'Completely out of character' - Search for Grace Millane continues
Tony McLeod, British High Commission Wellington consular manager, said the commission was aware of the missing person report. She maintained regular contact with her family and friends, but vanished from a "party hostel" the day before her birthday.
Under Tillerson, Nauert grew frustrated at not having close access to her immediate boss and had been seen as quitting to return to NY, where her family has remained.
Plucked from Fox by the White House to serve as State Department spokeswoman, Nauert catapulted into the upper echelons of the agency's hierarchy when Tillerson was sacked in March and replaced with Mike Pompeo. "She's very talented, very smart, very quick".
Who made the better point? "It is for the president, but it isn't for me", Hirono said. The more treaties we sign, the safer we supposedly are. It's likely that she'll also be asked to answer for the Trump administration's scorn for global bodies, including the UN, Bloomberg News reported.
The D-Day invasion was carried out by the United States and its allies.
But when White House officials told her they wanted her, she accepted.
She does, however, have something in common with Bolton.
Heather Nauert, 48, has been nominated as U.S. ambassador to the United Nations, capping a swift rise through the administration's ranks.