Roseanne Barr, shown arriving at the Los Angeles premiere of "Roseanne" on Friday in Burbank, Calif., has apologized for suggesting that former White House adviser Valerie Jarrett is a product of the Muslim Brotherhood and the "Planet of the Apes." Jarrett, who is black, advised Barack and Michelle Obama. 

Roseanne Barr, shown arriving at the Los Angeles premiere of "Roseanne" on Friday in Burbank, Calif., has apologized for suggesting that former White House adviser Valerie Jarrett is a product of the Muslim Brotherhood and the "Planet of the Apes." Jarrett, who is black, advised Barack and Michelle Obama. 

Jordan Strauss/Invision/AP

ABC has canceled Roseanne.

To everything, there is a season. That rings especially true after ABC canceled the reboot of its classic sitcom after only one season.

The cancellation followed star Roseanne Barr tweeting a scabrous comment about President Obama's former advisor Valerie Jarrett in which she characterized her as an "ape." That tweet, which is no longer available, was a few hours after midnight.

Barr responded to the outcry, at first saying "It's a joke" and then later saying "I apologize. I am now leaving Twitter." But it was too little, seemingly too late. Wanda Sykes, a "consulting producer" for the show, announced that she would not be returning soon after.

Barr's second apology had more heft, but it apparently came too late. She wrote: "I apologize to Valerie Jarrett and to all Americans. 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."

Roseanne had premiered to good reviews and even better ratings. Some heralded it as a watershed moment for TV and conservatives as Roseanne Conner was a supporter of Donald Trump just like the woman who played her. But in less than 12 hours, it all unraveled.

ABC President Channing Dungey was just as brief with a statement from ABC announcing the cancellation: "Roseanne's Twitter statement is abhorrent, repugnant and inconsistent with our values, and we have decided to cancel her show."

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