Mrs. Sadler, the aide who made controversial remarks about ailing Sen. John McCainJohn Sidney McCainWhite House aide who mocked McCain pushed out over tensions with Mercedes Schlapp: report Aide who mocked McCain no longer at White House Who has the edge for 2018: Republicans or Democrats?
Sadler remained employed in the White House for almost a month after making an insensitive comment about McCain in a closed meeting on May 10 because he opposed Trump's nomination of Gina Haspel for Central Intelligence Agency director.
White House Press Secretary Sarah Huckabee Sanders had refused to apologize for the remark and instead expressed outrage that the comment had leaked from an internal meeting.
Two unnamed sources told the Daily Beast that Sadler's accusations made Schlapp furious, and shortly after a private staff meeting, she referred to her as a "b*tch".
In this March 22, 2018 photo, special assistant to President Donald Trump, Kelly Sadler attends a forum at the Eisenhower Executive Office Building on the White House complex in Washington. However, the White House refused to condemn it, and instead issued a statement: "We respect Senator McCain's service to our nation and he and his family are in our prayers during this hard time".More news: Maria Sharapova fires back at Serena in book feud
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Privately, Sadler did apologize to McCain's daughter Meghan in a phone call.
Sadler was responsible for compiling and distributing talking points to allies of the Trump administration.
McCain, 81, was diagnosed in July with glioblastoma, an aggressive form of brain cancer.
The effort to find leakers has led to an acrimonious atmosphere at the White House, aides have told CNN. It's an honor and a privilege to work for the president and to be part of his administration.