ABC HAS CANCELLED its hit reboot of US sitcom Roseanne following her racist tweet about former Obama adviser Valerie Jarrett.

ABC Entertainment president Channing Dungey says the comment “is abhorrent, repugnant and inconsistent with our values, and we have decided to cancel the show”.

Barr’s tweet suggested that Jarrett is a product of the Muslim brotherhood and the Planet of the Apes.

After a barrage of criticism on social media, Barr deleted the tweet, apologised and then said she was leaving Twitter.

“I apologise to Valerie Jarrett and to all Americans,” Barr tweeted.

“I am truly sorry for making a bad joke about her politics and her looks. I should have known better. Forgive me – my joke was in bad taste.

“I apologise. I am now leaving Twitter,” she said.

Barr’s 1988-97 hit show Roseanne returned to the air this year with her as a Trump-supporting character.

The show is a rare depiction of working-class life on US television and also of Trump supporters, who have been largely ignored by Hollywood.

Barr is also an outspoken backer of US president Donald Trump in real life and frequently voices her support for him on Twitter.

The revival of Roseanne received good ratings and was recently renewed for a second season.

African-American comedian Wanda Sykes, a consulting producer on the show, announced today she would not be returning to the show.

Campaigns were also being launched on social media to pressure advertisers to drop their support of the show.

© – AFP 2018 with reporting by Associated Press.