After Mr Trump posted two tweets insulting Morning Joe co-hosts Joe Scarborough and Mika Brzezinski on Thursday morning, the author posted a screenshot of his words alongside a quote attributed to the 16th US president.
"'Nearly all men can stand adversity, but if you want to test a man's character, give him power.' Abraham Lincoln," she tweeted.
'Nearly all men can stand adversity, but if you want to test a man's character, give him power.' Abraham Lincoln pic.twitter.com/vkJnlXbnXg— J.K. Rowling (@jk_rowling) June 29, 2017
The quote led to over 51,000 re-tweets for the author.
This is not the first time Ms Rowling has attacked Mr Trump on Twitter. She has been vocal against him in the past.
Interestingly, the origins of the quote have been debated, with some even believing it came from Bob Ingersoll, a 19th-century jurist, in reference to Mr Lincoln. Click for more trending news