'Roseanne' producer Wanda Sykes quits after Barr compares Obama aide to an ape

Roseanne Barr often pens controversial tweets, but her latest one may have long-term implications for her show's massively successful revival.

The fallout from Barr's Memorial Day tweet, in which she said Obama aide Valerie Jarrett was a mix of "Muslim Brotherhood and Planet of the Apes," has motivated several "Roseanne" staffers to finally draw the line.

Actress-comedian Wanda Sykes, a consulting producer for "Roseanne," left nothing unclear with her definitive response: "I will not be returning to 'Roseanne,'" she tweeted. (Early reports called Sykes a head writer for the show; she has corrected that title.)

Meanwhile, Tom Arnold, a recurring guest star during the show's original run, unleashed an accusation against ABC's company leadership. "ABC execs figured out a way to control me," he tweeted. "They blocked me from promoting anything on ABC because I called out Roseanne Barr & her dangerous tweets."

Separately, showrunner Whitney Cummings left "Roseanne" last week.

Core cast members including John Goodman, Sara Gilbert and Laurie Metcalfe have not publicly commented. "Big Bang Theory" star Johnny Galecki, who has a recurring role on the show, also has not responded.