The protocol-busting move followed a falling out that press leaks say was partly linked to a dispute over seating arrangements on the plane that took the first lady for a tour of African countries in October.
Ricardel was among Bolton's first hires when he became national security adviser in March.
The outlet's sources, who shared their insight on the condition of anonymity, also revealed that Ricardel caused disruptions during Melania Trump's trip to Africa.
A little more than 24 hours passed before the answer came: Ricardel was leaving the White House for an unspecified job somewhere else.
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According to the AP, Pentagon officials have indicated that Ricardel had been a significant contributor to the rumor mill at the White House.
Bolton sent an email to the staff of the National Security Council on Thursday saying he was grateful to Ricardel "and her unwavering commitment to the president", according to a senior NSC official.
Sarah Sanders, a spokeswoman for the White House, explains that Ricardel will be reassigned to another position within the administration.
The power of the first lady is the relationship with the first man.
She recalled a famous incident when Nancy Reagan got Ronald Reagan's chief of staff Don Regan axed.
A White House official was blunter, describing the California native as ideologically driven and "obstinate".
Ricardel was raised in Pasadena, the child of a Croatian immigrant and went on to study at Georgetown University's School of Foreign Service and then do doctoral work at Tufts University's Fletcher School of Law and Diplomacy. "I look forward to her new role in another part of the administration".
If they didn't, she said, "they certainly learned through this".