Early Tuesday, Barr tweeted, "Muslim brotherhood & planet of the apes had a baby=vj", referring to Jarrett, who is black and was born in Iran.
Barr also revealed she would appear on Joe Rogan's podcast on Friday.
ABC bet on Trump supporters sticking with the program: Barr is an outspoken supporter herself, and her character on the show is, as well.
"I deeply regret my comments from late last night on Twitter".
ABC responded by canceling her massively successful revival and its Emmy "For Your Consideration" campaign, while talent agency ICM dropped Barr as a client and Viacom networks Paramount Network, TV Land and CMT canceled upcoming reruns of the revival series.
In another tweet: "I apologize. Forgive me - my joke was in bad taste", she tweeted.
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Odisha govt should cut its Value-Added Tax to control fuel price: Dharmendra Pradhan
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Roseanne Barr stands to lose a great deal of her fortune after her revived show was canned by ABC.
"Roseanne Barr's comments were appalling and reminiscent of a horrific time in our history when racism was not only acceptable but promoted by Hollywood".
"As well as the apology, Roseanne also retweeted messages from fans showing their support for the writer, who had used the hashtag: "#StandWithRoseanne". We know what Roseanne Barr thinks.
"I am hurt, embarrassed, and disappointed".
ABC Entertainment President Channing Dungey said in a statement later in the day, "Roseanne's Twitter statement is abhorrent, repugnant and inconsistent with our values, and we have made a decision to cancel her show". In another tweet: "As I called my manager to quit working on Roseanne, I was told it was cancelled".
What did her bosses and colleagues say? Today my words caused hundreds of people to lose their jobs. "I mistakenly thought she was white", she wrote. "Don't feel sorry for me, guys!" I imagine George Soros's nephews are lovely people. "It was widely known and meticulously documented that she was a flagrant bigot before @ABC & @Disney rolled out the red carpet for her anyway", he tweeted.