At the White House daily press briefing, the president's spokeswoman, Sarah Huckabee Sanders, expanded on Mr Trump's tweet.
And while Barr's initial reaction was contrite, apologising to the "hundreds of people" made unemployed by her actions, she moved to the attack on Thursday morning (AEST). She told another fan, "She's distancing herself from me and my tweet-she has to". Sanofi, the makers of Ambien, responded to say that "racism is not a known side effect".
Barr tweeted an apology to Jarrett for "making a bad joke about her politics and her looks", and offered several more apologies - including one in which she said she was using the sleep aid when she tweeted about Jarrett.
Her costars were pictured looking downcast after her show was cancelled and Ms Jarrett spoke out to point the finger of blame at President Trump.
Barr said she was considering fighting back after her show was cancelled.
"Roseanne" was an instant hit when it returned this spring after a two-decade hiatus. Barr's show, "Roseanne", was promptly cancelled by ABC. She called it "abhorrent, repugnant and inconsistent with our values". "But before it did the right thing, it did the wrong thing", she wrote.
Ramsey expressed disappointment that a TV star faces greater consequences for her ignorant, racist outbursts than our president has. Absolutely. But are we truly going to pretend, in Trump's 2018 America, that there aren't citizens of these United States who regularly refer to undocumented immigrants as "illegals"?
In other tweets, Barr urged fans to not defend her actions, and that losing her show is "0 compared 2 being labelled a racist over one tweet". Through her selection of retweets, Barr implied that she was sacked over her support for President Trump.
Interested in Roseanne? Add Roseanne as an interest to stay up to date on the latest Roseanne news, video, and analysis from ABC News. I made a mistake.
"The show is a product, and the show is called "Roseanne.' A central person who works for the show called 'Roseanne" is a woman named Roseanne Barr", said Amanda Lotz, a media studies professor at the University of MI.
Jarrett's name came up in response to Twitter commentary that raised her name in relation to an Obama conspiracy theory.
Hours after ABC axed her show for her offensive tweet about former Obama adviser Valerie Jarrett - and quickly breaking a promise to stay off Twitter - the comedian was back on the social media platform.
Three weeks earlier, "Roseanne" was the toast of ABC's annual presentation of its programming plans to advertisers.
And, then the internet had jokes.
In March, Barr revealed President Trump had congratulated her after the first episode of "Roseanne" since 1997 was watched by around 18.4 million viewers.
The show scored huge ratings and was renewed for an 11th season after largely positive reviews - including from the president.
"You throw me under the bus. nice!" she said in a tweet directed at Fishman.
"Good riddance", he tweeted about the "Roseanne" cancellation.