Haberman has authored a book on Trump titled “Confidence Man: The Making of Donald Trump and the Breaking of America.”

Source: https://www.benzinga.com/news/23/09/34188899/trump-unhappy-with-giuliani-for-not-winning-cases-biographer-says-relationship-hasnt-gone-to-where-i

Haberman made clear on Monday that, whether or not she was the one who reported that particular detail, she can personally vouch for its accuracy.

Source: https://www.mediaite.com/politics/maggie-haberman-responds-to-trump-denying-her-report-he-asked-sanders-for-an-endorsement/

Trump expert Maggie Haberman had another explanation for Trump's attacks on Merchan.

Source: https://theweek.com/donald-trump/1022438/trump-has-2-reasons-for-attacking-his-manhattan-trial-judge-new-york-times

“Trump has often been very critical of Giuliani over the last couple of years,” Haberman said.

Source: https://www.benzinga.com/news/23/09/34188899/trump-unhappy-with-giuliani-for-not-winning-cases-biographer-says-relationship-hasnt-gone-to-where-i