Trump distanced himself from Scaramucci, who had been the White House communications director for 11 days in 2017, saying that "I barely knew him until his 11 days of gross incompetence."
Trump added that Scaramucci "made a fool of himself...abused staff, got fired."
Scaramucci had been dismissed from his position in July 2017 after a brief but colorful tenure.
Referring to Scaramucci's book "Trump, the Blue-Collar President," Trump added that Scaramucci, "wrote a very nice book about me just recently. Now the book is a lie?"
Trump later deleted the tweet and replaced it with a new one with "shellacked" spelled correctly. The first version of the tweet has spelled it as "shellaced."
Trump has recently escalated his rhetorical war with his former staffer and has called him "totally incapable of handling" his White House job. Scaramucci, for his part, has called for the Republican Party to drop Trump as its nominee, and he was noncommital on future support for Trump.
Anthony Scaramucci is a highly unstable “nut job” who was with other candidates in the primary who got shellacked, & then unfortunately wheedled his way into my campaign. I barely knew him until his 11 days of gross incompetence-made a fool of himself, bad on TV. Abused staff,...— Donald J. Trump (@realDonaldTrump) August 19, 2019
"I've got to get some of these former cabinet officials in unity to speak up about it. They know it's a crisis. It goes back to things like the Caine mutiny court-martial," Scaramucci, making a reference to a 1954 movie about a mutiny aboard a U.S. Navy ship.
Scaramucci did not respond when asked who the former cabinet officials were, predicting instead a "trove of people" would come together.
This article originally appeared on USA TODAY: Trump lashes out at Anthony Scaramucci, calls him 'highly unstable'