"Almost immediately", the New York Times reports, Trump "lobbed a volley of insults at Mr. Sessions, telling the attorney general it was his fault they were in the current situation".
Mr Trump reportedly erupted during a meeting at the White House with senior advisers on May 17 when he was told of Mr Mueller's appointment.
President Donald Trump was reportedly irate over special counsel Robert Mueller being appointed and he took it out on Attorney General Jeff Sessions.
Sessions, who vacated his Senate seat to be Trump's attorney general, then wrote up a resignation letter for Trump.
Accusing Mr. Sessions of "disloyalty", Mr. Trump unleashed a string of insults on his attorney general.
That's from a new Times report by Michael Schmidt and Maggie Haberman that sheds some more light on Sessions' decision to recuse himself from the investigation which led to the appointment of a special counsel, a move that infuriated Trump as has been previously reported.
Yet after Sessions complied with Trump's demand and submitted a resignation letter, Trump eventually rejected it.
According to The Times, Sessions called the incident "the most humiliating experience in decades of public life". When the news was passed along to Trump, he turned his ire on Sessions, who had recused himself from the Russia probe after statements he made to Congress about Russian contacts during the campaign proved false. In July he even told aides he wanted Sessions out.
The issue was a point of cooperation for Trump and his attorney general, though the President has since said he's working on a legislative solution that will reinstate DACA with the help of congressional Democrats.
Sessions, meanwhile, no longer considers Trump a friend, but is enduring the complete disrespect of his boss because he doesn't want to lose this opportunity as the nation's top justice official to execute his career-long goal of implementing the immigrant-free country he's always dreamed about.