"Her tweet made ABC very nervous and they cancelled the show", she wrote.
In other tweets, Barr said that she was exhausted of "being attacked and belittled more than other comedians who have said worse" and asked for people not to boycott ABC, saying that the network has the right to "do what they wish".
Following a racist Tweet by Roseanne Barr, ABC Entertainment president Channing Dungey said: "Roseanne's Twitter statement is abhorrent, repugnant and inconsistent with our values, and we have chose to cancel her show".
"I apologize to Valerie Jarrett and to all Americans", Barr wrote Tuesday via Twitter. I BLAME MYSELF OK? it's just an explanation not an excuse, Ok, bully?
Barr's agent also dropped her and several services pulled "Roseanne" reruns.
Barr, 65, also issued a formal apology statement in which she expressed deep regret and apologized to Jarrett, ABC, and the cast and crew of her show. I have always lived and taught my children to be inclusive. Barr replied to Fishman's statement on Twitter.
Interested in Roseanne? Add Roseanne as an interest to stay up to date on the latest Roseanne news, video, and analysis from ABC News. "When you have a president who started his political career around birtherism [a campaign questioning Obama's citizenship by birth]. people like Roseanne feel they're empowered", he said.
'I am hurt, embarrassed, and disappointed.
Actor Don Cheadle called out the apparent racism in Barr's tweets.
Barr also continued to tweet about George Soros, a liberal donor who has been painted as the villain in many right-wing conspiracy theories.