Trump almost fired Ivanka Trump and Jared Kushner through a tweet.
Ivanka Trump and Jared Kushner were Trump's senior aides throughout his presidency.
Trump was about to tweet the dismissal, but Kelly interjected, telling the president to have a conversation with Ivanka and Kushner beforehand.
Both Ivanka and Kushner stayed at the White House throughout Trump's four years in office, often accompanying the president on trips with foreign leaders.
Haberman's book, "Confidence Man: The Making of Donald Trump and the Breaking of America," comes out on October 4.